ORCID Profile
0000-0002-5116-5425
Current Organisation
Australian National University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Optical Physics | Photonics, Optoelectronics and Optical Communications | Nonlinear Optics and Spectroscopy | Photonics and Electro-Optical Engineering (excl. Communications) | Nanophotonics | Nanotechnology | Optics And Opto-Electronic Physics | Optical Physics Not Elsewhere Classified | Electronic and magnetic properties of condensed matter; superconductivity | Materials engineering | Optical And Photonic Systems | Optical Technology | Classical Physics Not Elsewhere Classified | Functional materials | Condensed matter characterisation technique development | Nanomanufacturing | Quantum Optics | Electrostatics And Electrodynamics | Physical Sciences Not Elsewhere Classified | Quantum Optics And Lasers
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in the Physical Sciences | Physical sciences | Network switching equipment | Expanding Knowledge in Engineering | Emerging Defence Technologies | Network transmission equipment | Expanding Knowledge in Technology | Scientific instrumentation | Automotive Equipment | Integrated Circuits and Devices |
Related Links
Publications
Reflectionless potentials and cavities in waveguide arrays and coupled-resonator structures
Publisher: The Optical Society
Date: 26-03-2010
DOI: 10.1364/OL.35.000989
Complete conversion between one and two photons in nonlinear waveguides: theory of dispersion engineering
Publisher: IOP Publishing
Date: 06-2022
Abstract: High-efficiency photon-pair production is a long-sought-after goal for many optical quantum technologies, and coherent photon conversion (CPC) processes are promising candidates for achieving this. We show theoretically how to control coherent conversion between a narrow-band pump photon and broadband photon pairs in nonlinear optical waveguides by tailoring frequency dispersion for broadband quantum frequency mixing. We reveal that complete deterministic conversion as well as pump-photon revival can be achieved at a finite propagation distance. We also find that high conversion efficiencies can be realised robustly over long propagation distances. These results demonstrate that dispersion engineering is a promising way to tune and optimise the CPC process.
Discrete quadratic solitons with competing second-harmonic components
Publisher: American Physical Society (APS)
Date: 22-11-2011
Nonlinear Bloch modes in two-dimensional photonic lattices
Publisher: The Optical Society
Date: 2006
DOI: 10.1364/OE.14.001913
Abstract: We generate experimentally different types of two-dimensional Bloch waves of a square photonic lattice by employing the phase imprinting technique.We probe the local dispersion of the Bloch modes in the photonic lattice by analyzing the linear diffraction of beams associated with the high-symmetry points of the Brillouin zone, and also distinguish the regimes of normal, anomalous, and anisotropic diffraction through observations of nonlinear self-action effects.
Observation of tunneling of slow and fast electromagnetic modes in coupled periodic waveguides
Publisher: AIP Publishing
Date: 07-02-2011
DOI: 10.1063/1.3553785
Abstract: We report the experimental observation of tunneling of slow and fast electromagnetic modes in coupled periodic waveguides shifted longitudinally by half of modulation period. According to the symmetry analysis, such a coupler supports two electromagnetic modes with exactly matched slow or fast group velocities but different phase velocities for frequencies close to the edge of the photonic band. We confirm the predicted properties of the modes by directly extracting their dispersion and group velocities from the near-field measurements using specialized Bloch-wave spectral analysis method.
Spectral photonic lattices with complex long-range coupling
Publisher: The Optical Society
Date: 20-11-2017
Bistability suppression and low threshold switching using frozen light at a degenerate band edge waveguide
Publisher: The Optical Society
Date: 19-11-2012
DOI: 10.1364/OE.20.027363
Coherence Controlled Soliton Interactions
Publisher: American Physical Society (APS)
Date: 18-02-2005
Spatial optical solitons in waveguide arrays
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2003
Unified approach for retrieval of effective parameters of metamaterials
Publisher: SPIE
Date: 05-05-2011
DOI: 10.1117/12.886476
Generation of orbital-angular-momentum-entangled biphotons in triangular quadratic waveguide arrays
Publisher: American Physical Society (APS)
Date: 10-06-2013
Scattering of linear and nonlinear waves in a waveguide array with aPT
Publisher:
American Physical Society (APS)
Date:
28-07-2011
Publisher: American Physical Society (APS)
Date: 28-07-2011
Polarization Engineering of Entangled Photons from a Lithium Niobate Nonlinear Metasurface
Publisher: American Chemical Society (ACS)
Date: 23-08-2023
Synthesizing multi-dimensional excitation dynamics and localization transition in one-dimensional lattices
Publisher: Springer Science and Business Media LLC
Date: 16-12-2020
A new type of surface waves in diffraction-managed optical waveguide arrays
Publisher: IEEE
Date: 05-2008
Biphoton generation in quadratic waveguide arrays: A classical optical simulation
Publisher: Springer Science and Business Media LLC
Date: 07-08-2012
DOI: 10.1038/SREP00562
Nonlinear Spectral-Spatial Control and Localization of Supercontinuum Radiation
Publisher: American Physical Society (APS)
Date: 18-09-2007
Spatio-temporal dynamics of laser pulses in lithium niobate waveguide arrays
Publisher: IEEE
Date: 08-2011
Directional nonlinear wave transport in photonic lattices
Publisher: IEEE
Date: 2006
Controlled generation and steering of spatial gap solitons
Publisher: American Physical Society (APS)
Date: 19-08-2004
Scalable on-chip quantum state tomography
Publisher: Springer Science and Business Media LLC
Date: 08-03-2018
DOI: 10.1038/S41534-018-0063-5
Abstract: Quantum information systems are on a path to vastly exceed the complexity of any classical device. The number of entangled qubits in quantum devices is rapidly increasing, and the information required to fully describe these systems scales exponentially with qubit number. This scaling is the key benefit of quantum systems, however it also presents a severe challenge. To characterize such systems typically requires an exponentially long sequence of different measurements, becoming highly resource demanding for large numbers of qubits. Here we propose and demonstrate a novel and scalable method for characterizing quantum systems based on expanding a multi-photon state to larger dimensionality. We establish that the complexity of this new measurement technique only scales linearly with the number of qubits, while providing a tomographically complete set of data without a need for reconfigurability. We experimentally demonstrate an integrated photonic chip capable of measuring two- and three-photon quantum states with statistical reconstruction fidelity of 99.71%.
Complex structure and efficient characterization of multiphoton split states in integrated circuits
Publisher: American Physical Society (APS)
Date: 30-06-2023
Azimuthons: Spatially Modulated Vortex Solitons
Publisher: American Physical Society (APS)
Date: 09-11-2005
Slow-light switching in nonlinear Bragg-grating couplers
Publisher: The Optical Society
Date: 30-04-2007
DOI: 10.1364/OL.32.001429
Abstract: We study propagation and switching of slow-light pulses in nonlinear couplers with phase-shifted Bragg gratings. We demonstrate that power-controlled nonlinear self-action of light can be used to compensate for dispersion-induced broadening of pulses through the formation of gap solitons, to control pulse switching in the coupler, and to tune the propagation velocity.
Global increase in wildfire risk due to climate‐driven declines in fuel moisture
Publisher: Wiley
Date: 02-12-2022
DOI: 10.1111/GCB.16006
Abstract: There is mounting concern that global wildfire activity is shifting in frequency, intensity, and seasonality in response to climate change. Fuel moisture provides a powerful means of detecting changing fire potential. Here, we use global burned area, weather reanalysis data, and the Canadian fire weather index system to calculate fuel moisture trends for multiscale biogeographic regions across a gradient in vegetation productivity. We quantify the proportion of days in the local fire season between 1979 and 2019, where fuel moisture content is below a critical threshold indicating extreme fire potential. We then associate fuel moisture trends over that period to vegetation productivity and comment on its implications for projected anthropogenic climate change. Overall, there is a strong drying trend across realms, biomes, and the productivity gradient. Even where a wetting trend is observed, this often indicates a trend toward increasing fire activity due to an expected increase in fuel production. The detected trends across the productivity gradient lead us to conclude global fire activity will increase with anthropogenic climate change.
Defect-Free Surface States in Modulated Photonic Lattices
Publisher: American Physical Society (APS)
Date: 23-05-2008
Quantum metasurface for multiphoton interference and state reconstruction
Publisher: American Association for the Advancement of Science (AAAS)
Date: 14-09-2018
Abstract: Metasurfaces should allow wafer-thin surfaces to replace bulk optical components. Two reports now demonstrate that metasurfaces can be extended into the quantum optical regime. Wang et al. determined the quantum state of multiple photons by simply passing them through a dielectric metasurface, scattering them into single-photon detectors. Stav et al. used a dielectric metasurface to generate entanglement between spin and orbital angular momentum of single photons. The results should aid the development of integrated quantum optic circuits operating on a nanophotonic platform. Science , this issue p. 1104 , p. 1101
Loss saturation in dispersion-engineered slow light waveguides
Publisher: IEEE
Date: 05-2011
Transverse phase-matched second-harmonic generation from counterpropagating beams for characterising ultrashort pulses
Publisher: IEEE
Date: 06-2007
On The Cavitation and Pore Blocking in Cylindrical Pores with Simple Connectivity
Publisher: American Chemical Society (ACS)
Date: 29-09-2011
DOI: 10.1021/JP2068304
Abstract: We present a grand canonical Monte Carlo (GCMC) simulation of argon adsorption in connected cylindrical pores at 87.3 K. A number of pore models are constructed from various components: finite cylinder, finite cone, and flat surface. In the case of two cylinders of different sizes connected to each other with open ends, the adsorption isotherm can be described by a combination of two independent pores, the smaller of which is opened at both ends while the larger one is closed at one end. The adsorption isotherm depends on the relative size between the two sections of the connected pore. In the case of a cavity connected to the bulk surrounding gas via one or two narrower cylindrical necks, the phenomenon of either pore blocking or cavitation is observed, depending on the relative size between the neck and the cavity. If the neck size is smaller than a critical size, D(c), we observe cavitation, while pore blocking is observed when it is greater than D(c). This is due to the dominance of one of two mechanisms for removal of the adsorbates: either the receding of the menisci or the stretching of the fluid in the cavity. We also explore the effects of neck length and cavity length on the adsorption isotherm and conclude that while the neck length has a negligible effect on cavitation, it is of considerable importance when pore blocking occurs, because this process is controlled by the formation and movement of the meniscus in the pore neck. The effect of cavity length is found to be negligible in both cases.
Time-reversal and nonlocal effects in PT -symmetric nonlinear lattices with balanced gain and loss
Publisher: SPIE
Date: 08-09-2011
DOI: 10.1117/12.894528
Optical phase transitions and quantum walks in nonlinear waveguide arrays
Publisher: IEEE
Date: 08-2011
Generation and stability of discrete gap solitons
Publisher: The Optical Society
Date: 12-2003
DOI: 10.1364/OL.28.002345
Abstract: We analyze stability and generation of discrete gap solitons in weakly coupled optical waveguides. We demonstrate how both stable and unstable solitons can be observed experimentally in the engineered binary waveguide arrays and also reveal a connection between the gap-soliton instabilities and limitations on the mutual beam focusing in periodic photonic structures.
Nonlocal gap soliton in liquid infiltrated photonic crystal fibres
Publisher: IEEE
Date: 07-2008
Observation of polychromatic gap solitons generated by supercontinuum light
Publisher: IEEE
Date: 05-2007
Demonstration of all-optical beam steering in modulated photonic lattices
Publisher: The Optical Society
Date: 15-05-2006
DOI: 10.1364/OL.31.001498
Abstract: We demonstrate experimentally all-optical beam steering in modulated photonic lattices induced optically by three-beam interference in a biased photorefractive crystal. We identify and characterize the key physical parameters governing the beam steering and show that the spatial resolution can be enhanced by the additional effect of nonlinear beam self-localization.
Complex-Birefringent Dielectric Metasurfaces for Arbitrary Polarization-Pair Transformations
Publisher: American Chemical Society (ACS)
Date: 16-10-2020
Control of cavity modes in coupled periodic waveguides
Publisher: AIP
Date: 2009
DOI: 10.1063/1.3253940
All-optical switching of slow-light pulses in nonlinear Bragg grating couplers
Publisher: IEEE
Date: 08-2007
Effect of weak discreteness on two-soliton collisions in nonlinear Schrödinger equation
Publisher: Elsevier BV
Date: 05-2002
Dispersion extraction with near-field measurements in periodic waveguides
Publisher: The Optical Society
Date: 25-02-2009
DOI: 10.1364/OE.17.003716
Abstract: We formulate and demonstrate experimentally the high-resolution spectral method based on Bloch-wave symmetry properties for extracting mode dispersion in periodic waveguides from measurements of near-field profiles. We characterize both the propagating and evanescent modes, and also determine the litudes of forward and backward waves in different waveguide configurations, with the estimated accuracy of several percent or less. Whereas the commonly employed spatial Fourier-transform (SFT) analysis provides the wavenumber resolution which is limited by the inverse length of the waveguide, we achieve precise dispersion extraction even for compact photonic structures.
Self-phase modulation and frequency generation with few-cycle optical pulses in nonlinear dispersive media
Publisher: American Physical Society (APS)
Date: 19-11-2012
Soliton formation in square photonic lattice through combined effects of total internal and Bragg reflections
Publisher: IEEE
Date: 2005
Spatial-spectral discrete vortex solitons in quadratic lattices
Publisher: IEEE
Date: 06-2009
Anderson localization in synthetic photonic lattices
Publisher: Springer Science and Business Media LLC
Date: 27-06-0026
DOI: 10.1038/S41598-017-04059-Z
Abstract: Synthetic photonic lattices provide unique capabilities to realize theoretical concepts emerging in different fields of wave physics via the utilization of powerful photonic technologies. Here we observe experimentally Anderson localization for optical pulses in time domain, using a photonic mesh lattice composed of coupled fiber loops. We introduce a random potential through programmed electro-optic pulse phase modulation, and identify the localization features associated with varying degree of disorder. Furthermore, we present a practical approach to control the band-gap width in photonic lattices by varying the coupling between the fiber loops, and reveal that the strongest degree of localization is limited and increases in lattices with wider band-gaps. Importantly, this opens a possibility to enhance or reduce the effect of disorder and associated localization of optical pulses.
Complete Band Gaps in One-Dimensional Left-Handed Periodic Structures
Publisher: American Physical Society (APS)
Date: 02-11-2005
Interface Solitons in Electro-Optically ConfigurableWaveguide Arrays
Publisher: IEEE
Date: 06-2009
Solitons in waveguide arrays with competing quadratic nonlinearities
Publisher: IEEE
Date: 05-2011
Reflectionless defects in coupled resonator waveguides
Publisher: IEEE
Date: 06-2009
Optical solitons inPT
Publisher: American Physical Society (APS)
Date: 28-06-2012
Observation of discrete gap solitons in binary waveguide arrays
Publisher: The Optical Society
Date: 15-12-2004
DOI: 10.1364/OL.29.002890
Abstract: We report an experimental study of discrete gap solitons in binary arrays of optical waveguides. We observe self-focusing indicating soliton generation when the inclination angle of an input beam is slightly above the Bragg angle and show that the propagation direction of the emerging gap soliton is influenced by the effect of interband momentum exchange.
Diffraction-managed solitons and nonlinear beam diffusion in modulated waveguide arrays
Publisher: IEEE
Date: 05-2008
Soliton mobility in nonlinear lattices
Publisher: SPIE
Date: 16-09-2005
DOI: 10.1117/12.620954
Observation of nonlinear surface waves in modulated waveguide arrays
Publisher: The Optical Society
Date: 09-09-2009
DOI: 10.1364/OL.34.002751
Lattice-controlled modulation instability in photorefractive feedback systems
Publisher: The Optical Society
Date: 21-10-2010
DOI: 10.1364/OL.35.003568
Analytical Description of Quadratic Parametric Solitons
Publisher: Springer Netherlands
Date: 2001
Metasurface-Assisted Quantum Ghost Discrimination of Polarization Objects
Publisher: American Physical Society (APS)
Date: 13-12-2021
Dimensions of the diet-exercise relationship in later life: A qualitative study
Publisher: Elsevier BV
Date: 10-2023
Spatial switching in modulated photonic lattices
Publisher: IEEE
Date: 2005
Optically-induced lattices as tunable nonlinear photonic crystals
Publisher: IEEE
Date: 2005
Nonlinear directional coupler for polychromatic light
Publisher: The Optical Society
Date: 02-02-2007
DOI: 10.1364/OL.32.000475
Abstract: We demonstrate that a nonlinear directional coupler with special bending of waveguide axes can be used for all-optical switching of polychromatic light with a very broad spectrum covering all of the visible region. The bandwidth of the suggested device is enhanced five times compared with conventional couplers. Our results suggest novel opportunities for the creation of all-optical logical gates and switches for polychromatic light with white-light and supercontinuum spectra.
Chaotic character of two-soliton collisions in the weakly perturbed nonlinear Schrödinger equation
Publisher: American Physical Society (APS)
Date: 14-10-2002
On a class of spatial discretizations of equations of the nonlinear Schrödinger type
Publisher: Elsevier BV
Date: 03-2007
Beam oscillations and curling in chirped periodic structures with metamaterials
Publisher: American Physical Society (APS)
Date: 27-01-2009
Photon pair generation and quantum walks in quadratic nonlinear waveguide arrays
Publisher: IEEE
Date: 08-2011
Nonlinear control of light in periodic photonic structures: From waveguides to cavities
Publisher: IEEE
Date: 2009
Nonlinear quantum spectroscopy with parity–time-symmetric integrated circuits
Publisher: Optica Publishing Group
Date: 30-06-2022
DOI: 10.1364/PRJ.450410
Abstract: We propose a novel quantum nonlinear interferometer design that incorporates a passive parity–time (PT)-symmetric coupler sandwiched between two nonlinear sections where signal–idler photon pairs are generated. The PT symmetry enables efficient coupling of the longer-wavelength idler photons and facilitates the sensing of losses in the second waveguide exposed to analyte under investigation, whose absorption can be inferred by measuring only the signal intensity at a shorter wavelength where efficient detectors are readily available. Remarkably, we identify a new phenomenon of sharp signal intensity fringe shift at critical idler loss values, which is distinct from the previously studied PT symmetry breaking. We discuss how such unconventional properties arising from quantum interference can provide a route to enhancing the sensing of analytes and facilitate broadband spectroscopy applications in integrated photonic platforms.
Focusing-to-defocusing crossover in nonlinear periodic structures
Publisher: The Optical Society
Date: 22-09-2010
DOI: 10.1364/OL.35.003213
Slow-light enhanced optical forces between longitudinally shifted photonic-crystal nanowire waveguides
Publisher: The Optical Society
Date: 17-02-2012
DOI: 10.1364/OL.37.000785
Broadband switching of polychromatic light in nonlinear waveguide couplers
Publisher: IEEE
Date: 06-2007
Breathers inPT
Publisher: American Physical Society (APS)
Date: 07-11-2012
Fundamental limits for transmission modulation in VO2 metasurfaces
Publisher: Optica Publishing Group
Date: 23-12-2022
DOI: 10.1364/PRJ.474328
Abstract: The interest in dynamic modulation of light by ultra-thin materials exhibiting insulator–metal phase transition, such as VO 2 , has rapidly grown due to the myriad industrial applications, including smart windows and optical limiters. However, for applications in the telecommunication spectral band, the light modulation through a thin VO 2 film is low due to the presence of strong material loss. Here, we demonstrate tailored nanostructuring of VO 2 to dramatically enhance its transmission modulation, reaching a value as high as 0.73, which is 2 times larger than the previous modulation achieved. The resulting designs, including free-topology optimization, demonstrate the fundamental limit in acquiring the desired optical performance, including achieving positive or negative transmission contrast. Our results on nanophotonic management of lossy nanostructured films open new opportunities for applications of VO 2 metasurfaces.
Light localization in azimuthally modulated Bessel photonic lattices
Publisher: Springer Science and Business Media LLC
Date: 30-03-2007
Band structure and broadband compensation of absorption by amplification in layered optical metamaterials
Publisher: Pleiades Publishing Ltd
Date: 05-2012
Combined frequency conversion and pulse compression in nonlinear tapered waveguides
Publisher: IEEE
Date: 12-2010
A process and outcome evaluation of an in-class vegetable promotion program
Publisher: Elsevier BV
Date: 06-2018
DOI: 10.1016/J.APPET.2018.01.023
Abstract: Nutrition interventions that target both fruits and vegetables are effective in increasing fruit consumption, but have been limited in their ability to improve vegetable intake. To address the low proportion of children meeting vegetable intake guidelines, approaches specifically targeting vegetables are needed. This paper reports on a mixed-method analysis of a 10-week vegetable promotion pilot project that aimed to increase vegetable intake as part of the existing Crunch&Sip in-class fruit and vegetable break program. The intervention was designed to promote vegetable consumption through the implementation of vegetable-focused resources, including curriculum resources and parent education materials. Teachers completed pre- and end-of-intervention surveys. Process measures related to the use of resources and teachers' perceptions of barriers to implementation. The outcome evaluation included measures of children's vegetable consumption during Crunch&Sip breaks and teachers' attitudes and confidence relating to educating students about the benefits of consuming vegetables. Twenty-one Western Australian primary schools already participating in the Crunch&Sip program participated in the pilot intervention and evaluation. Coverage included 35 primary school teachers representing 818 students aged 4-11 years. The proportion of children bringing vegetables for Crunch&Sip more than doubled over the 10-week intervention (21% vs 46% p < 0.001). Improvements were observed in teachers' perceived knowledge about the nutritional benefits of vegetables (p = 0.001) and confidence to educate students about the benefits of vegetable consumption (p = 0.028). Preferentially promoting vegetable consumption as part of an existing school-based nutrition program may be an effective strategy to increase children's vegetable intake.
Spatiotemporal control of light by Bloch-mode dispersion in multi-core fibers
Publisher: The Optical Society
Date: 11-04-2008
DOI: 10.1364/OE.16.005878
Abstract: We study theoretically the dispersion properties of Bloch modes and nonlinearly-induced defect states in two-dimensional waveguide arrays. We define the conditions for achieving anomalous group-velocity dispersion and discuss possibilities for generation of spatiotemporal solitons.
Shaping and switching of polychromatic light in arrays of periodically curved nonlinear waveguides
Publisher: Walter de Gruyter GmbH
Date: 2008
DOI: 10.2478/S11534-008-0047-8
Abstract: We overview our recent theoretical results on spatio-spectral control, diffraction management, and broadband all-optical switching of polychromatic light in periodically curved one and two dimensional arrays of coupled optical waveguides. In particular, we show that polychromatic light beams and patterns produced by white-light and supercontinuum sources can experience wavelength-independent normal, anomalous, or zero diffraction in specially designed structures. We also demonstrate that in the nonlinear regime, it is possible to achieve broadband all-optical switching of polychromatic light in a directional waveguide coupler with special bending of the waveguide axes. Our results suggest novel opportunities for creation of all-optical logical gates and switches which can operate in a very broad frequency region, e.g., covering the entire visible spectrum.
Exploring the role of fire, succession, climate, and weather on landscape dynamics using comparative modeling
Publisher: Elsevier BV
Date: 09-2013
Nonlinear dynamics with higher-order modes in lithium niobate waveguide arrays
Publisher: Springer Science and Business Media LLC
Date: 26-07-2011
Observation of polychromatic gap solitons
Publisher: Optica Publishing Group
Date: 14-04-2008
DOI: 10.1364/OE.16.005991
Abstract: We study theoretically and observe experimentally polychromatic gap solitons generated by supercontinuum light in an array of optical waveguides. The solitons are formed through a sharp transition from diffraction-induced broadening and color separation to the simultaneous spatio-spectral localization of supercontinuum light inside the photonic bandgap with the formation of the characteristic staggered phase structure for all colors.
Chaotic oscillations of coupled nanobeam cavities with tailored optomechanical potentials
Publisher: The Optical Society
Date: 09-06-2014
DOI: 10.1364/OL.39.003543
Photon pair generation and pump filtering in nonlinear adiabatic waveguiding structures
Publisher: The Optical Society
Date: 11-02-2014
DOI: 10.1364/OL.39.000953
Tunable positive and negative refraction in optically induced photonic lattices
Publisher: The Optical Society
Date: 09-2005
DOI: 10.1364/OL.30.002293
Abstract: We study tunable refraction of light in one-dimensional periodic lattices induced optically in a photorefractive crystal. We observe experimentally both positive and negative refraction of beams that selectively excite the first or second spectral bands of the periodic lattice, and we demonstrate tunability of the output beam position by dynamically adjusting the lattice depth. At higher laser intensities, beam broadening due to diffraction can be suppressed through nonlinear self-focusing while preserving the general steering properties.
Far‐Field Polarization Engineering from Nonlinear Nanoresonators
Publisher: Wiley
Date: 10-10-2022
Abstract: Nanoresonators fabricated from low‐loss dielectrics with second‐order nonlinearity have emerged as a widespread platform for nonlinear frequency conversion at the nanoscale. However, a persisting challenge in this research is the generated complex far‐field polarization state of the upconverted light, which is a limiting factor in many applications. It will be highly desirable to generate uniform far‐field polarization states across all propagation directions, to control the polarization truly along the optical axis and to simultaneously be able to tune the polarization along the entire circumference of the Poincaré sphere by solely modifying the excitation polarization. Here, a nonlinear nanoresonator combining all these properties is theoretically proposed and experimentally demonstrated. At first, an analytical model connecting the induced multipolar content of a nanoresonator with a desired far‐field polarization is derived. Based on this, a nonlinear dielectric nanoresonator is designed to enable sum‐frequency generation (SFG) with highly pure and tuneable far‐field polarization states. In the experiment, the nanoresonators fabricated from the III‐V semiconductor gallium arsenide in (110)‐orientation are excited in an SFG scheme with in idually controllable excitation beams. The generation of highly uniform and tuneable far‐field polarization states is demonstrated by combining back‐focal plane measurements with Stokes polarimetry.
TaCoNa-Photonics 2010
Publisher: Elsevier BV
Date: 10-2011
The Science of Firescapes: Achieving Fire-Resilient Communities
Publisher: Oxford University Press (OUP)
Date: 02-2016
Discrete surface solitons in semi-infinite binary waveguide arrays
Publisher: The Optical Society
Date: 10-07-2006
DOI: 10.1364/OL.31.002332
Abstract: We analyze discrete surface modes in semi-infinite binary waveguide arrays, which can support simultaneously two types of discrete solitons. We demonstrate that the analysis of linear surface states in such arrays provides important information about the existence of nonlinear surface modes and their properties. We find numerically the families of both discrete surface solitons and nonlinear Tamm (gap) states and study their stability properties.
Coupled cavities and band-edge slow-light effects in periodic waveguides
Publisher: SPIE
Date: 11-02-2010
DOI: 10.1117/12.848666
Binary parity-time-symmetric nonlinear lattices with balanced gain and loss
Publisher: The Optical Society
Date: 27-08-2010
DOI: 10.1364/OL.35.002976
Phase sensitivity of light dynamics in PT-symmetric couplers
Publisher: Springer Science and Business Media LLC
Date: 23-10-2013
Observation of Bloch oscillations with a threshold
Publisher: AIP Publishing
Date: 05-2017
DOI: 10.1063/1.4982879
Abstract: We demonstrate experimentally Bloch oscillations, which occur above a certain threshold value of the effective potential gradient in lattices with specially modulated coupling between the neighboring sites. We formulate the general conditions for this phenomenon, arising due to the competition between the tilting and broadening of the transmission band, and explain why no threshold was present in any previous observations. Our experiments are performed in inhomogeneous photonic lattices, which represent the process of quantum two-mode squeezing in Fock space, underpinning a fundamental quantum-classical correspondence.
Inline detection and reconstruction of multiphoton quantum states
Publisher: The Optical Society
Date: 07-01-2019
Enhanced generation of angle correlated photon-pairs in nonlinear metasurfaces
Publisher: IOP Publishing
Date: 03-2022
Abstract: We reveal that strongly enhanced generation of photon pairs with narrow frequency spectra and sharp angular correlations can be realised through spontaneous parametric down-conversion in metasurfaces. This is facilitated by creating meta-gratings through nano-structuring of nonlinear films of sub-wavelength thickness to support the extended bound state in the continuum resonances, associated with ultra-high Q -factors, at the biphoton wavelengths across a wide range of emission angles. Such spectral features of photons can be beneficial for various applications, including quantum imaging. Our modelling demonstrates a pronounced enhancement, compared to unpatterned films, of the total photon-pair generation rate normalized to the pump power reaching 1.75 kHz mW −1 , which is robust with respect to the angular bandwidth of the pump, supporting the feasibility of future experimental realisations.
One-dimensional periodic structures with complete spectral gap
Publisher: SPIE
Date: 28-12-2006
DOI: 10.1117/12.638680
Slow-light and evanescent modes at interfaces in photonic crystal waveguides: Optimal extraction from experimental near-field measurements
Publisher: The Optical Society
Date: 31-03-2011
Combined frequency conversion and pulse compression in nonlinear tapered waveguides
Publisher: The Optical Society
Date: 03-02-2012
DOI: 10.1364/OL.37.000446
Frozen and broadband slow light in coupled periodic nanowire waveguides
Publisher: The Optical Society
Date: 30-01-2012
DOI: 10.1364/OE.20.003519
Experimental observation of slow light tunneling in coupled periodic waveguides
Publisher: IEEE
Date: 07-2008
Coupled-mode theory analysis of optical forces between longitudinally shifted periodic waveguides
Publisher: The Optical Society
Date: 28-02-2013
Guided modes in negative-refractive-index waveguides
Publisher: American Physical Society (APS)
Date: 19-05-2003
Soliton dynamics in deformable nonlinear lattices
Publisher: American Physical Society (APS)
Date: 21-08-2006
Crossover from self-defocusing to discrete trapping in nonlinear waveguide arrays
Publisher: The Optical Society
Date: 2006
Abstract: We predict a sharp crossover from nonlinear self-defocusing to discrete self-trapping of a narrow Gaussian beam with the increase of the refractive index contrast in a periodic photonic lattice. We demonstrate experimentally nonlinear discrete localization of light with defocusing nonlinearity by single site excitation in LiNbO(3) waveguide arrays.
Shaping the colors of polychromatic light in femtosecond laser-written two-dimensional waveguide arrays
Publisher: IEEE
Date: 07-2008
Publisher's Note: Loss compensation in metal-dielectric layered metamaterials [Phys. Rev. B87, 115139 (2013)]
Publisher: American Physical Society (APS)
Date: 02-04-2013
Two-dimensional surface waves in modulated photonic lattices
Publisher: IEEE
Date: 08-2011
Incoherent multi-gap optical solitons in nonlinear photonic lattices
Publisher: The Optical Society
Date: 2005
Abstract: We demonstrate numerically that partially incoherent light can be trapped in the spectral band gaps of a photonic lattice, creating partially incoherent multi-component spatial optical solitons in a self-defocusing nonlinear periodic medium. We find numerically such incoherent multi-gap optical solitons and discuss how to generate them in experiment by interfering incoherent light beams at the input of a nonlinear periodic medium.
Health halo or genuine product development: Are better‐for‐you alcohol products actually healthier?
Publisher: Wiley
Date: 05-09-2022
DOI: 10.1002/HPJA.531
Abstract: Alcoholic products marketed as better‐for‐you is an emerging trend in Australia that has received limited research attention to date. This study aimed to examine the nutrient profiles of alcoholic products marketed as better‐for‐you that are available in the Australian market. We extracted the details of alcoholic product announcements published on the Drinks Trade website in 2019 and 2020 containing at least one keyword used to promote better‐for‐you products. The alcohol, energy, carbohydrate and sugar content of each product was recorded and assessed against existing classifications for alcohol strength and sugar and carbohydrate content. We identified 144 products promoted as better‐for‐you. The majority of products (85%, n = 122) were classified as full‐strength, and the median alcohol content across each alcohol product category was classified as full‐strength. Most of the energy content came from alcohol, with 62% of products deriving at least 75% of their energy content from alcohol. Alcoholic products marketed as better‐for‐you appear to rely on an illusion of healthfulness, without addressing the ingredient of most concern to health, the alcohol content. Controls on alcohol marketing should be expanded to limit the use of health and nutrient claims. Mandatory labelling of alcoholic products with nutrition information would support consumers to be better informed about the contents of alcoholic products.
Spontaneous parametric down-conversion and quantum walks in arrays of quadratic nonlinear waveguides
Publisher: American Physical Society (APS)
Date: 10-01-2012
Nonlinear transition between PT-symmetric and PT-broken modes in coupled fiber lasers
Publisher: Optica Publishing Group
Date: 28-09-2020
DOI: 10.1364/OE.397853
Abstract: We present a systematic analysis of the stationary regimes of nonlinear parity-time (PT) symmetric laser composed of two coupled fiber cavities. We find that power-dependent nonlinear phase shifters broaden regions of existence of both PT-symmetric and PT-broken modes, and can facilitate transitions between modes of different types. We show the existence of non-stationary regimes and demonstrate an ambiguity of the transition process for some of the unstable states. We also identify the presence of higher-order stationary modes, which return to the initial state periodically after a certain number of round-trips.
Observation of slow-light dynamics in coupled periodic waveguides
Publisher: IEEE
Date: 06-2009
Control of light transmission in laser-written phase-shifted Bragg grating couplers
Publisher: The Optical Society
Date: 11-04-2011
DOI: 10.1364/OL.36.001380
Erratum: Crown fire behaviour in a northern jack pine - Black spruce forest (Canadian Journal of Forest Researh (2004) 34, (1548 - 1560))
Publisher: Canadian Science Publishing
Date: 08-2006
DOI: 10.1139/X06-185
Nonlocal effects in waveguide arrays with PT-symmetric defects
Publisher: IEEE
Date: 05-2011
Multi-soliton complexes in a sea of radiation modes
Publisher: Elsevier BV
Date: 08-2001
Observation of novel surface waves in optical waveguide arrays
Publisher: IEEE
Date: 07-2008
Nonlinear Bloch-wave spectroscopy of optically-induced gratings
Publisher: IEEE
Date: 2003
Three-dimensional matter-wave vortices in optical lattices
Publisher: American Physical Society (APS)
Date: 10-10-2005
Polychromatic nonlinear surface modes generated by supercontinuum light
Publisher: Optica Publishing Group
Date: 2006
DOI: 10.1364/OE.14.011265
Abstract: We study propagation of polychromatic light near the edge of a nonlinear waveguide array. We describe simultaneous spatial and spectral beam reshaping associated with power and wavelength-dependent tunneling between the waveguides. We present experimental verifications of the effects predicted theoretically including the first observation of supercontinuum nonlinear surface modes.
Comparison of the sensitivity of landscape-fire-succession models to variation in terrain, fuel pattern, climate and weather
Publisher: Springer Science and Business Media LLC
Date: 2006
Diffraction cancellation
Publisher: Springer Science and Business Media LLC
Date: 22-12-2010
Nonlinear optics and light localization in periodic photonic lattices
Publisher: World Scientific Pub Co Pte Lt
Date: 03-2007
DOI: 10.1142/S0218863507003548
Abstract: We review the recent developments in the field of photonic lattices emphasizing their unique properties for controlling linear and nonlinear propagation of light. We draw some important links between optical lattices and photonic crystals pointing towards practical applications in optical communications and computing, beam shaping, and biosensing.
Two-color multistep cascading and parametric soliton-induced waveguides
Publisher: American Physical Society (APS)
Date: 11-1999
DOI: 10.1103/PHYSREVE.60.R5056
Abstract: We introduce the concept of two-color multistep cascading for vectorial parametric wave mixing in optical media with quadratic (second-order or chi(2)) nonlinear response. We demonstrate that the multistep cascading allows light-guiding-light effects with quadratic spatial solitons. With the help of the so-called "almost exact" analytical solutions, we describe the properties of parametric waveguides created by two-wave quadratic solitons.
Reduced-symmetry two-dimensional solitons in photonic lattices
Publisher: American Physical Society (APS)
Date: 19-01-2006
Erratum to: Crown fire behaviour in a northern jack pine - black spruce forest (Can. J. For. Res., (2004), 34, (1548-1560))
Publisher: Canadian Science Publishing
Date: 2011
DOI: 10.1139/X10-219
Nonlinear Bloch-wave interaction and Bragg scattering in optically induced lattices
Publisher: American Physical Society (APS)
Date: 03-03-2004
Shaping and control of polychromatic light in nonlinear photonic lattices
Publisher: The Optical Society
Date: 26-09-2007
DOI: 10.1364/OE.15.013058
Abstract: Focus Serial: Frontiers of Nonlinear Optics We overview our recent results on spatio-spectral control, diffraction management, broadband switching, and self-trapping of polychromatic light in periodic photonic lattices in the form of rainbow gap solitons, polychromatic surface waves, and multigap color breathers. We show that an interplay of wave scattering from a periodic structure and interaction of multiple colors in media with slow nonlinear response can be used to selectively separate or combine different spectral components. We use an array of optical waveguides fabricated in a LiNbO(3) crystal to actively control the output spectrum of the supercontinuum radiation and generate polychromatic gap solitons through a sharp transition from spatial separation of spectral components to the simultaneous spatio-spectral localization of supercontinuum light. We also show that by introducing specially optimized periodic bending of waveguides in the longitudinal direction, one can manage the strength and type of diffraction in an ultra-broad spectral region and, in particular, realize the multicolor Talbot effect.
Incorporating the Water Footprint and Virtual Water into Policy: Reflections from the Mancha Occidental Region, Spain
Publisher: Springer Science and Business Media LLC
Date: 15-07-2009
Multidimensional synthetic chiral-tube lattices via nonlinear frequency conversion
Publisher: Springer Science and Business Media LLC
Date: 20-07-2020
DOI: 10.1038/S41377-020-0299-7
Abstract: Geometrical dimensionality plays a fundamentally important role in the topological effects arising in discrete lattices. Although direct experiments are limited by three spatial dimensions, the research topic of synthetic dimensions implemented by the frequency degree of freedom in photonics is rapidly advancing. The manipulation of light in these artificial lattices is typically realized through electro-optic modulation yet, their operating bandwidth imposes practical constraints on the range of interactions between different frequency components. Here we propose and experimentally realize all-optical synthetic dimensions involving specially tailored simultaneous short- and long-range interactions between discrete spectral lines mediated by frequency conversion in a nonlinear waveguide. We realize triangular chiral-tube lattices in three-dimensional space and explore their four-dimensional generalization. We implement a synthetic gauge field with nonzero magnetic flux and observe the associated multidimensional dynamics of frequency combs, all within one physical spatial port. We anticipate that our method will provide a new means for the fundamental study of high-dimensional physics and act as an important step towards using topological effects in optical devices operating in the time and frequency domains.
Special topic on synthetic gauge field photonics
Publisher: AIP Publishing
Date: 05-2022
DOI: 10.1063/5.0093334
Comparative Study of FDTD-Adopted Numerical Algorithms for Kerr Nonlinearities
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2011
Towards on-chip photon-pair bell tests: Spatial pump filtering in a LiNbO3 adiabatic coupler
Publisher: AIP Publishing
Date: 25-12-2017
DOI: 10.1063/1.5008445
Abstract: Nonlinear optical waveguides enable the integration of entangled photon sources and quantum logic gates on a quantum photonic chip. One of the major challenges in such systems is separating the generated entangled photons from the pump laser light. In this work, we experimentally characterize double-N-shaped nonlinear optical adiabatic couplers designed for the generation of spatially entangled photon pairs through spontaneous parametric down-conversion, while simultaneously providing spatial pump filtering and keeping photon-pair states pure. We observe that the pump photons at a wavelength of 671 nm mostly remain in the central waveguide, achieving a filtering ratio of over 20 dB at the outer waveguides. We also perform classical characterization at the photon-pair wavelength of 1342 nm and observe that light fully couples from an input central waveguide to the outer waveguides, showing on chip separation of the pump and the photon-pair wavelength.
Slow light bullets in arrays of nonlinear Bragg-grating waveguides
Publisher: IEEE
Date: 2006
Asymmetric vortex solitons in nonlinear periodic lattices
Publisher: American Physical Society (APS)
Date: 03-08-2004
TaCoNa-Photonics 2009
Publisher: Elsevier BV
Date: 09-2010
Atom-mediated spontaneous parametric down-conversion in periodic waveguides
Publisher: The Optical Society
Date: 13-11-2017
DOI: 10.1364/OL.42.004724
Multi-component optical solitary waves
Publisher: Elsevier BV
Date: 12-2000
Elevated Fasting Blood Glucose Levels Are Associated with Worse Clinical Outcomes in COVID-19 Patients Than in Pneumonia Patients with Bacterial Infections
Publisher: MDPI AG
Date: 10-08-2022
DOI: 10.3390/PATHOGENS11080902
Abstract: Aims: We investigate how fasting blood glucose (FBG) levels affect the clinical severity in coronavirus disease 2019 (COVID-19) patients, pneumonia patients with sole bacterial infection, and pneumonia patients with concurrent bacterial and fungal infections. Methods: We enrolled 2761 COVID-19 patients, 1686 pneumonia patients with bacterial infections, and 2035 pneumonia patients with concurrent infections. We used multivariate logistic regression analysis to assess the associations between FBG levels and clinical severity. Results: FBG levels in COVID-19 patients were significantly higher than in other pneumonia patients during hospitalisation and at discharge (all p 0.05). Among COVID-19 patients, the odds ratios of acute respiratory distress syndrome (ARDS), respiratory failure (RF), acute hepatitis/liver failure (AH/LF), length of stay, and intensive care unit (ICU) admission were 12.80 (95% CI, 4.80–37.96), 5.72 (2.95–11.06), 2.60 (1.20–5.32), 1.42 (1.26–1.59), and 5.16 (3.26–8.17) times higher in the FBG ≥7.0 mmol/L group than in FBG 6.1 mmol/L group, respectively. The odds ratios of RF, AH/LF, length of stay, and ICU admission were increased to a lesser extent in pneumonia patients with sole bacterial infection (3.70 [2.21–6.29] 1.56 [1.17–2.07] 0.98 [0.88–1.11] 2.06 [1.26–3.36], respectively). The odds ratios of ARDS, RF, AH/LF, length of stay, and ICU admission were increased to a lesser extent in pneumonia patients with concurrent infections (3.04 [0.36–6.41] 2.31 [1.76–3.05] 1.21 [0.97–1.52] 1.02 [0.93–1.13] 1.72 [1.19–2.50], respectively). Among COVID-19 patients, the incidence rate of ICU admission on day 21 in the FBG ≥ 7.0 mmol/L group was six times higher than in the FBG 6.1 mmol/L group (12.30% vs. 2.21%, p 0.001). Among other pneumonia patients, the incidence rate of ICU admission on day 21 was only two times higher. Conclusions: Elevated FBG levels at admission predict subsequent clinical severity in all pneumonia patients regardless of the underlying pathogens, but COVID-19 patients are more sensitive to FBG levels, and suffer more severe clinical complications than other pneumonia patients.
Confinement of light in left-handed periodic structures
Publisher: IEEE
Date: 2005
Trapped Supercontinuum and Multi-Color Gap Solitons
Publisher: The Optical Society
Date: 12-2007
Polychromatic dynamic localization in curved photonic lattices
Publisher: Springer Science and Business Media LLC
Date: 22-03-2009
DOI: 10.1038/NPHYS1221
A qualitative exploration of the factors underlying seniors' receptiveness to entomophagy
Publisher: Elsevier BV
Date: 2018
DOI: 10.1016/J.FOODRES.2017.10.032
Abstract: Entomophagy presents a novel approach to securing a nutritive and environmentally sustainable food source to meet the needs of a growing and ageing population. To date, research exploring the receptiveness of Western consumers towards entomophagy has focused on younger age groups and there has been little examination of the views of older adults. The aims of this study were to (i) explore the factors associated with older people's attitudes towards entomophagy and (ii) identify strategies to encourage seniors to adopt the practice. Interviews were conducted with 77 Western Australian seniors aged 60years and over. The average age of the interviewees was 73years and most were female (n=67). Reflecting the lack of promotion of entomophagy as a desirable eating behaviour, there were very low levels of awareness of the environmental and nutritional advantages of this practice. Most of the interviewed seniors saw entomophagy as a disgusting practice that was incompatible with their cultural beliefs and values, however a small group viewed it as a novel and potentially enjoyable experience. The findings suggest that strategies to target the former group could focus on overcoming the disgust reaction, such as by disguising insects in food and providing guarantees of food safety. Consumption in the latter group could be facilitated by improving knowledge and skills relating to the preparation of insect-based foods. Strategies to increase entomophagy in the Western world need to consider the unique views of different consumer groups towards the practice.
Observation of Two-Dimensional Dynamic Localization of Light
Publisher: American Physical Society (APS)
Date: 06-2010
Negative refraction in tunable periodic photonic structures
Publisher: SPIE
Date: 16-09-2005
DOI: 10.1117/12.622634
Discrete nonlinear Schrödinger equations free of the Peierls–Nabarro potential
Publisher: Elsevier BV
Date: 08-2006
Tea and flavonoid intake predict osteoporotic fracture risk in elderly Australian women: A prospective study
Publisher: Elsevier BV
Date: 10-2015
Abstract: Observational studies have linked tea drinking, a major source of dietary flavonoids, with higher bone density. However, there is a paucity of prospective studies examining the association of tea drinking and flavonoid intake with fracture risk. The objective of this study was to examine the associations of black tea drinking and flavonoid intake with fracture risk in a prospective cohort of women aged >75 y. A total of 1188 women were assessed for habitual dietary intake with a food-frequency and beverage questionnaire. Incidence of osteoporotic fracture requiring hospitalization was determined through the Western Australian Hospital Morbidity Data system. Multivariable adjusted Cox regression was used to examine the HRs for incident fracture. Over 10 y of follow-up, osteoporotic fractures were identified in 288 (24.2%) women 212 (17.8%) were identified as a major osteoporotic fracture, and of these, 129 (10.9%) were a hip fracture. In comparison with the lowest tea intake category (≤1 cup/wk), consumption of ≥3 cups/d was associated with a 30% decrease in the risk of any osteoporotic fracture (HR: 0.70 95% CI: 0.50, 0.96). Compared with women in the lowest tertile of total flavonoid intake (from tea and diet), women in the highest tertile had a lower risk of any osteoporotic fracture (HR: 0.65 95% CI: 0.47, 0.88), major osteoporotic fracture (HR: 0.66 95% CI: 0.45, 0.95), and hip fracture (HR: 0.58 95% CI: 0.36, 0.95). For specific classes of flavonoids, statistically significant reductions in fracture risk were observed for higher intake of flavonols for any osteoporotic fracture and major osteoporotic fracture, as well as flavones for hip fracture (P < 0.05). Higher intake of black tea and particular classes of flavonoids were associated with lower risk of fracture-related hospitalizations in elderly women at high risk of fracture.
Nonlinear Localized Waves in a Periodic Medium
Publisher: American Physical Society (APS)
Date: 08-2001
Spatiotemporal light localization in infiltrated waveguide arrays
Publisher: IEEE
Date: 07-2008
Polarization Rotation in Silicon Waveguides: Analytical Modeling and Applications
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2010
Spatial-spectral vortex solitons in quadratic lattices
Publisher: The Optical Society
Date: 06-04-2009
DOI: 10.1364/OL.34.001168
Abstract: We predict the existence of spatial-spectral vortex solitons in one-dimensional periodic waveguide arrays with quadratic nonlinear response. In such vortices the energy flow forms a closed loop through the simultaneous effects of phase gradients at the fundamental frequency and second-harmonic fields and the parametric frequency conversion between the spectral components. The linear stability analysis shows that such modes are stable in a broad parameter region.
Slow-light enhanced optomechanical interactions
Publisher: SPIE
Date: 09-02-2012
DOI: 10.1117/12.914744
Light localization in Bessel photonic lattices
Publisher: IEEE
Date: 2006
Discrete gap solitons in modulated waveguide arrays
Publisher: The Optical Society
Date: 12-2002
DOI: 10.1364/OL.27.002112
Abstract: We suggest a novel concept of diffraction management in waveguide arrays and predict the existence of discrete gap solitons that possess the properties of both conventional discrete and Bragg grating solitons. We demonstrate that one can control both the soliton velocity and the propagation direction by varying the input light intensity.
Biphoton generation and pump filtering in nonlinear adiabatic waveguiding structures
Publisher: IEEE
Date: 06-2014
Design tolerances of nonlinear Bragg-grating couplers optimised for all-optical slow-light switching
Publisher: IEEE
Date: 07-2008
Two-dimensional bandgap in one-dimensional negative-index periodic structures
Publisher: IEEE
Date: 2005
Localization of light in optically-induced modulated Bessel lattices
Publisher: IEEE
Date: 2006
Resolving the mystery of milliwatt-threshold opto-mechanical self-oscillation in dual-nanoweb fiber
Publisher: AIP Publishing
Date: 28-06-2016
DOI: 10.1063/1.4953373
Abstract: It is interesting to pose the question: How best to design an optomechanical device, with no electronics, optical cavity, or laser gain, that will self-oscillate when pumped in a single pass with only a few mW of single-frequency laser power? One might begin with a mechanically resonant and highly compliant system offering very high optomechanical gain. Such a system, when pumped by single-frequency light, might self-oscillate at its resonant frequency. It is well-known, however, that this will occur only if the group velocity dispersion of the light is high enough so that phonons causing pump-to-Stokes conversion are sufficiently dissimilar to those causing pump-to-anti-Stokes conversion. Recently it was reported that two light-guiding membranes 20 μm wide, ∼500 nm thick and spaced by ∼500 nm, suspended inside a glass fiber capillary, oscillated spontaneously at its mechanical resonant frequency (∼6 MHz) when pumped with only a few mW of single-frequency light. This was surprising, since perfect Raman gain suppression would be expected. In detailed measurements, using an interferometric side-probing technique capable of resolving nanoweb movements as small as 10 pm, we map out the vibrations along the fiber and show that stimulated intermodal scattering to a higher-order optical mode frustrates gain suppression, permitting the structure to self-oscillate. A detailed theoretical analysis confirms this picture. This novel mechanism makes possible the design of single-pass optomechanical oscillators that require only a few mW of optical power, no electronics nor any optical resonator. The design could also be implemented in silicon or any other suitable material.
Optical Neural Network Based on Synthetic Nonlinear Photonic Lattices
Publisher: American Physical Society (APS)
Date: 03-02-2022
Observation of diffraction-managed discrete solitons in curved waveguide arrays
Publisher: American Physical Society (APS)
Date: 15-09-2008
Objective assessment of compliance with a state-wide school food-service policy via menu audits.
Publisher: Cambridge University Press (CUP)
Date: 22-02-2019
DOI: 10.1017/S1368980019000156
Abstract: The Healthy Food and Drink Policy was implemented in Western Australian government schools in 2007. The aim of the present study was to assess the compliance of Western Australian school canteen menus with the policy a decade after its introduction. The traffic-light system that underpins the Healthy Food and Drink Policy categorises foods and drinks into three groups: ‘green’ healthy items, ‘amber’ items that should be selected carefully and ‘red’ items that lack nutritional value. Canteen menus were collected online and each menu item was coded as a green, amber or red choice. Western Australia. Online canteen menus from 136 primary and secondary government schools. The majority of audited school menus met policy requirements to include ≥60 % green items (84 %) and ≤40 % amber items (90 %), but only 52 % completely excluded red items. Overall, approximately half (48 %) of school canteen menus met all three traffic-light targets. On average, 70 % of the menu items were green, 28 % were amber and 2 % were red. Primary-school canteen menus were more likely than those from secondary schools to meet the requirements of the policy. While the s led Western Australian government school canteen menus were highly compliant with most of the requirements of the Healthy Food and Drink Policy, many offered red foods and/or drinks. Providing all schools with further education about identifying red items and offering additional services to secondary schools may help improve compliance rates.
Slow light in photonic crystals with loss or gain
Publisher: SPIE
Date: 10-02-2011
DOI: 10.1117/12.880774
Raman Amplification and Tunable Pulse Delays in Silicon Waveguides
Publisher: AIP
Date: 2010
DOI: 10.1063/1.3506140
Enhanced wave transport in nonlinear quasi-periodic lattices
Publisher: IEEE
Date: 2005
Managing light in nonlinear disordered media
Publisher: The Optical Society
Date: 12-2007
Spatially entangled photon pairs from lithium niobate nonlocal metasurfaces
Publisher: American Association for the Advancement of Science (AAAS)
Date: 29-07-2022
Abstract: Metasurfaces consisting of nanoscale structures are underpinning new physical principles for the creation and shaping of quantum states of light. Multiphoton states that are entangled in spatial or angular domains are an essential resource for many quantum applications however, their production traditionally relies on bulky nonlinear crystals. We predict and demonstrate experimentally the generation of spatially entangled photon pairs through spontaneous parametric down-conversion from a metasurface incorporating a nonlinear thin film of lithium niobate covered by a silica meta-grating. We measure the correlations of photon pairs and identify their spatial antibunching through violation of the classical Cauchy-Schwarz inequality, witnessing the presence of multimode entanglement. Simultaneously, the photon-pair rate is strongly enhanced by 450 times as compared to unpatterned films because of high-quality-factor resonances. These results pave the way to miniaturization of various quantum devices by incorporating ultrathin metasurfaces functioning as room temperature sources of quantum-entangled photons.
Spatial optical solitons in nonlinear photonic crystals
Publisher: American Physical Society (APS)
Date: 13-02-2002
Mobile light bullets in curved waveguide arrays
Publisher: IEEE
Date: 06-2009
Nonlinear surface waves in curved waveguide arrays
Publisher: IEEE
Date: 06-2009
Slow light with flat or offset band edges in few-mode fiber with two gratings
Publisher: Optica Publishing Group
Date: 2007
DOI: 10.1364/OE.15.017954
Abstract: We consider mode coupling in multimode optical fibers using either two Bragg gratings or a Bragg grating and a long-period grating. We show that the magnitude of the band edge curvature can be controlled leading to a flat, quartic band-edge or to two band edges at distinct, nonequivalent k-values, allowing precise control of slow light propagation.
Light propagation and localization in modulated photonic lattices and waveguides
Publisher: Elsevier BV
Date: 09-2012
Bloch-mode analysis for retrieving effective parameters of metamaterials
Publisher: American Physical Society (APS)
Date: 18-07-2012
Slow-light enhanced forces between shifted photonic-crystal waveguides
Publisher: IEEE
Date: 05-2011
Discrete self-trapping vs. defocusing in nonlinear waveguide arrays
Publisher: IEEE
Date: 2006
<title>Optical lattices as nonlinear photonic crystals</title>
Publisher: SPIE
Date: 02-03-2007
DOI: 10.1117/12.726976
Diffraction control in periodically curved two-dimensional waveguide arrays
Publisher: The Optical Society
Date: 20-07-2007
DOI: 10.1364/OE.15.009737
Abstract: We study propagation of light beams in two-dimensional photonic lattices created by periodically curved waveguide arrays. We demonstrate that by designing the waveguide bending, one can control not only the strength and sign of the beam diffraction, but also to engineer the effective geometry and even dimensionality of the two-dimensional photonic lattice. We reveal that diffraction of different spectral components of polychromatic light can display completely different patterns in the same periodically modulated structure, e.g. one-dimensional, hexagonal, or rectangular. Our results suggest novel opportunities for efficient self-collimation, focusing, and reshaping of light beams in two-dimensional photonic structures.
Soliton control in modulated optically-induced photonic lattices
Publisher: The Optical Society
Date: 25-07-2005
Abstract: We discuss soliton control in reconfigurable optically-induced photonic lattices created by three interfering beams. We reveal novel dynamical regimes for strongly localized solitons, including binary switching and soliton revivals through resonant wave mixing.
Multiport soliton devices with controllable transmission
Publisher: The Optical Society
Date: 06-2003
DOI: 10.1364/OL.28.000908
Abstract: We describe new planar multiport devices written by spatial solitons that are composed of several nonlinearly coupled components in Kerr-type media. Such devices have no radiation losses at a given wavelength. We demonstrate that, for the same relative angle between the input soliton-induced channels, one can vary the transmission coefficients into the output channels by adjusting the polarizations of multicomponent solitons. We determine analytically the transmission properties and discuss two types of experimental embodiment of the proposed device.
Complete spectral gap in coupled dielectric waveguides embedded into metal
Publisher: AIP Publishing
Date: 12-07-2010
DOI: 10.1063/1.3458694
Abstract: We study a plasmonic coupler involving backward (TM01) and forward (HE11) modes of dielectric waveguides embedded into an infinite metallic background. The simultaneously achievable contradirectional energy flows and codirectional phase velocities in different channels lead to a spectral gap, despite the absence of periodic structures along the waveguide. We demonstrate that a complete spectral gap can be achieved in a symmetric structure composed of four coupled waveguides.
Transition from slow and frozen to superluminal and backward light through loss or gain in dispersion-engineered waveguides
Publisher: American Physical Society (APS)
Date: 11-04-2012
Cascaded third harmonic generation in lithium niobate nanowaveguides
Publisher: AIP Publishing
Date: 06-06-2011
DOI: 10.1063/1.3597627
Abstract: We predict highly efficient third harmonic generation through simultaneous phase-matching of second-harmonic generation and sum-frequency generation in lithium niobate nanowaveguides, enabled due to strong modal dispersion. We demonstrate that the waveguide size which corresponds to phase-matching is also optimal for highest mode confinement and therefore for strongly enhanced conversion efficiency.
Population Structure and Reproductive Biology of Two Sympatric Species of Persephona (Brachyura: Leucosiidae) off Northeastern Brazil
Publisher: Springer Science and Business Media LLC
Date: 07-10-2020
Photon-pair generation in a quadratically nonlinear parity-time symmetric coupler
Publisher: The Optical Society
Date: 12-02-2018
DOI: 10.1364/PRJ.6.0000A6
Three-dimensional matter-wave vortices in optical lattices
Publisher: IEEE
Date: 2005
Monitoring ultrashort pulses by transverse frequency doubling of counterpropagating pulses in random media
Publisher: AIP Publishing
Date: 16-07-2007
DOI: 10.1063/1.2751583
Abstract: The authors study experimentally the transverse second-harmonic generation of counterpropagating pulses by a quasi-phase-matching in a medium with a random ferroelectric domain structure. The authors show that this parametric process results in a direct realization of the cross correlation of two optical signals and, therefore, it can be employed for direct characterizations of ultrashort pulses including their temporal structure and pulse front tilt.
Relative importance of fuel management, ignition management and weather for area burned: Evidence from five landscapefiresuccession models
Publisher: CSIRO Publishing
Date: 2009
DOI: 10.1071/WF07085
Abstract: The behaviour of five landscape fire models (CAFÉ, FIRESCAPE, LAMOS(HS), LANDSUM and SEM-LAND) was compared in a standardised modelling experiment. The importance of fuel management approach, fuel management effort, ignition management effort and weather in determining variation in area burned and number of edge pixels burned (a measure of potential impact on assets adjacent to fire-prone landscapes) was quantified for a standardised modelling landscape. Importance was measured as the proportion of variation in area or edge pixels burned explained by each factor and all interactions among them. Weather and ignition management were consistently more important for explaining variation in area burned than fuel management approach and effort, which were found to be statistically unimportant. For the number of edge pixels burned, weather and ignition management were generally more important than fuel management approach and effort. Increased ignition management effort resulted in decreased area burned in all models and decreased number of edge pixels burned in three models. The findings demonstrate that year-to-year variation in weather and the success of ignition management consistently prevail over the effects of fuel management on area burned in a range of modelled ecosystems.
Coupling of cavities: the way to impose control over their modes
Publisher: SPIE
Date: 30-04-2010
DOI: 10.1117/12.855783
Intensity limits for stationary and interacting multi-soliton complexes
Publisher: Elsevier BV
Date: 12-2002
Discrete reduced-symmetry solitons and second-band vortices in two-dimensional nonlinear waveguide arrays
Publisher: American Physical Society (APS)
Date: 15-10-2009
Slow-light dispersion in coupled periodic waveguides
Publisher: The Optical Society
Date: 18-09-2008
Observation of two-dimensional nonlocal gap solitons
Publisher: The Optical Society
Date: 26-01-2009
DOI: 10.1364/OL.34.000295
Abstract: We demonstrate, both theoretically and experimentally, the existence of nonlocal gap solitons in two-dimensional periodic photonic structures with defocusing thermal nonlinearity. We employ liquid-infiltrated photonic crystal fibers and show how the system geometry can modify the effective response of a nonlocal medium and the properties of two-dimensional gap solitons.
Cavity mode control in side-coupled periodic waveguides: Theory and experiment
Publisher: Elsevier BV
Date: 09-2010
Direct characterization of a nonlinear photonic circuit's wave function with laser light
Publisher: Springer Science and Business Media LLC
Date: 12-01-2018
DOI: 10.1038/LSA.2017.143
Abstract: Integrated photonics is a leading platform for quantum technologies including nonclassical state generation 1, 2, 3, 4 , demonstration of quantum computational complexity 5 and secure quantum communications 6 . As photonic circuits grow in complexity, full quantum tomography becomes impractical, and therefore an efficient method for their characterization 7, 8 is essential. Here we propose and demonstrate a fast, reliable method for reconstructing the two-photon state produced by an arbitrary quadratically nonlinear optical circuit. By establishing a rigorous correspondence between the generated quantum state and classical sum-frequency generation measurements from laser light, we overcome the limitations of previous approaches for lossy multi-mode devices 9, 10 . We applied this protocol to a multi-channel nonlinear waveguide network and measured a 99.28±0.31% fidelity between classical and quantum characterization. This technique enables fast and precise evaluation of nonlinear quantum photonic networks, a crucial step towards complex, large-scale, device production.
Disorder-protected quantum state transmission through helical coupled-resonator waveguides
Publisher: Optica Publishing Group
Date: 28-09-2020
DOI: 10.1364/PRJ.399919
Abstract: We predict the preservation of temporal indistinguishability of photons propagating through helical coupled-resonator optical waveguides (H-CROWs). H-CROWs exhibit a pseudospin-momentum locked dispersion, which we show suppresses on-site disorder-induced backscattering and group velocity fluctuations. We simulate numerically the propagation of two-photon wave packets, demonstrating that they exhibit almost perfect Hong–Ou–Mandel dip visibility and then can preserve their quantum coherence even in the presence of moderate disorder, in contrast with regular CROWs, which are highly sensitive to disorder. As indistinguishability is the most fundamental resource of quantum information processing, H-CROWs may find applications for the implementation of robust optical links and delay lines in the emerging quantum photonic communication and computational platforms.
Supercontinuum spatial gap solitons
Publisher: IEEE
Date: 06-2007
Bistable lasing in parity-time symmetric coupled fiber rings
Publisher: The Optical Society
Date: 20-03-2018
DOI: 10.1364/PRJ.6.000A18
Observation of Defect-Free Surface Modes in Optical Waveguide Arrays
Publisher: American Physical Society (APS)
Date: 13-11-2008
Anti-Fermi-Pasta-Ulam energy recursion in diatomic lattices at low energy densities
Publisher: American Physical Society (APS)
Date: 17-09-2009
Experimental observation of evanescent modes at the interface to slow-light photonic crystal waveguides
Publisher: The Optical Society
Date: 25-03-2011
DOI: 10.1364/OL.36.001170
Harmonic generation enhancement due to interaction of few-cycle light pulses in nonlinear dielectric coating on a mirror
Publisher: Elsevier BV
Date: 11-2017
Light bullets in nonlinear periodically curved waveguide arrays
Publisher: American Physical Society (APS)
Date: 26-04-2010
Broadband diffraction management and self-collimation of white light in photonic lattices
Publisher: American Physical Society (APS)
Date: 21-12-2006
Classical simulation of squeezed light in optical waveguide arrays
Publisher: American Physical Society (APS)
Date: 17-05-2013
Nonlinear coupled-mode theory for periodic plasmonic waveguides and metamaterials with loss and gain
Publisher: The Optical Society
Date: 20-01-2014
DOI: 10.1364/OL.39.000462
Tunable negative refraction in optical lattices
Publisher: IEEE
Date: 2005
Localization of light in Bessel photonic lattices
Publisher: IEEE
Date: 07-2006
Polychromatic light localisation in periodic structures
Publisher: Springer Berlin Heidelberg
Date: 17-06-2010
Bloch Oscillations and Zener Tunneling in Two-Dimensional Photonic Lattices
Publisher: American Physical Society (APS)
Date: 09-02-2006
Discrete interband mutual focusing in nonlinear photonic lattices
Publisher: The Optical Society
Date: 11-07-2005
Abstract: We study nonlinear coupling of mutually incoherent beams associated with different Floquet-Bloch waves in a one-dimensional optically-induced photonic lattice. We demonstrate experimentally how such interactions lead to asymmetric mutual focusing and, for waves with opposite diffraction properties, to simultaneous focusing and defocusing as well as discreteness-induced beam localization and reshaping effects.
Spatio-temporal dynamics of single-cycle optical pulses and nonlinear frequency conversion
Publisher: World Scientific Pub Co Pte Lt
Date: 07-04-2014
DOI: 10.1142/S0217979214420077
Abstract: We model propagation of initially single-cycle wave packet exhibiting paraxial spatial diffraction in a homogeneous isotropic dielectric medium with normal group velocity dispersion and instantaneous cubic nonlinearity. We show that for higher input intensity, the number of field oscillations is increased and the temporal spectrum shifts to shorter wavelengths in the axial beam part and to longer wavelengths at the periphery of the beam, and this is accompanied by the formation of closed surfaces of equal phase. We find that at tripled frequencies a minimum of spectral density forms at low spatial frequencies, which is characteristic for single-cycle pulses. At higher spatial frequencies, the maximum of the spectral density shifts to quadruple temporal frequencies.
Photon-pair generation in arrays of cubic nonlinear waveguides
Publisher: The Optical Society
Date: 19-11-2012
DOI: 10.1364/OE.20.027441
Bloch oscillations in chirped layered structures with metamaterials
Publisher: The Optical Society
Date: 2008
DOI: 10.1364/OE.16.003299
Abstract: We analyze the Bloch oscillations of electromagnetic waves in chirped layered structures with alternating layers of negative-index metamaterial and conventional dielectric under the condition of the zero average refractive index. We consider the case when the chirp is introduced by varying the thickness of the layers linearly across the structure. We demonstrate that such structures can support three different types of the Bloch oscillations for electromagnetic waves associated with either propagating or evanescent guided modes. In particular, we predict a novel type of the Bloch oscillations associated with coupling between surface waves excited at the interfaces separating the layers of negative-index metamaterial and the layers of the conventional dielectric.
Multisoliton complexes on a background
Publisher: American Physical Society (APS)
Date: 05-2000
Abstract: We obtain solutions of M coupled nonlinear Schrodinger equations that describe multisoliton complexes (MCs) on a background. We present explicit multiparameter families of solutions and numerical simulations, demonstrating specific features of MCs and their collisions. It is shown, in particular, that a MC on a background can have a complicated intensity profile due to a nonlinear superposition of pairs of bright and dark single solitons.
Surface multi-gap vector solitons
Publisher: The Optical Society
Date: 2006
DOI: 10.1364/OE.14.004780
Abstract: We analyze nonlinear collective effects near surfaces of semi-infinite periodic systems with multi-gap transmission spectra and introduce a novel concept of multi-gap surface solitons as mutually trapped surface states with the components associated with different spectral gaps. We find numerically discrete surface modes in semi-infinite binary waveguide arrays which can support simultaneously two types of discrete solitons, and analyze different multi-gap states including the soliton-induced waveguides with the guided modes from different gaps and composite vector solitons.
Photon pair generation in quadratic waveguide arrays: A classical optical simulation
Publisher: IEEE
Date: 05-2013
Spectral pulse transformations and phase transitions in quadratic nonlinear waveguide arrays
Publisher: The Optical Society
Date: 11-2011
DOI: 10.1364/OE.19.023188
Nonlinear coupled-mode theory for periodic waveguides and metamaterials with loss and gain
Publisher: AIP
Date: 2012
DOI: 10.1063/1.4750102
Observation of transverse instabilities in optically induced lattices
Publisher: The Optical Society
Date: 02-2004
DOI: 10.1364/OL.29.000259
Abstract: We study experimentally the Bloch-wave instabilities in optically induced photonic lattices. We reveal two different instability scenarios associated with either the transverse modulational instability of a single Bloch wave or the nonlinear interband coupling between different Bloch waves. We show that the transverse instability is greatly enhanced in the induced lattice in comparison with homogeneous media.
Surface multi-gap solitons in nonlinear waveguide arrays
Publisher: IEEE
Date: 07-2006
Understanding what is what in marine shrimp fisheries
Publisher: FapUNIFESP (SciELO)
Date: 2020
Observation of nonlinear self-trapping in triangular photonic lattices
Publisher: The Optical Society
Date: 26-01-2007
DOI: 10.1364/OL.32.000397
Abstract: We experimentally study light self-trapping in triangular photonic lattices induced optically in nonlinear photorefractive crystals. We observe the formation of two-dimensional discrete and gap spatial solitons originating from the first and second bands of the linear transmission spectrum.
Spatial Switching of Slow Light in Periodic Photonic Structures
Publisher: Springer Berlin Heidelberg
Date: 17-06-2009
Nonlinear surface waves in left-handed materials
Publisher: American Physical Society (APS)
Date: 30-01-2004
Pulse monitoring based on transverse SHG in periodic and disordered media
Publisher: SPIE
Date: 21-12-2008
DOI: 10.1117/12.760280
Enhanced Soliton Transport in Quasiperiodic Lattices with Introduced Aperiodicity
Publisher: American Physical Society (APS)
Date: 23-03-2006
Phase Transitions of Nonlinear Waves in Quadratic Waveguide Arrays
Publisher: American Physical Society (APS)
Date: 12-2010
Defect-Free Surface Waves
Publisher: The Optical Society
Date: 12-2008
Synthetic photonic lattice for single-shot reconstruction of frequency combs
Publisher: AIP Publishing
Date: 03-2020
DOI: 10.1063/1.5144119
Abstract: We formulate theoretically and demonstrate experimentally an all-optical method for reconstruction of the litude, phase, and coherence of frequency combs from a single-shot measurement of the spectral intensity. Our approach exploits synthetic frequency lattices with pump-induced spectral short- and long-range couplings between different signal components across a broad bandwidth of hundreds of GHz in a single nonlinear fiber. When combined with ultra-fast signal conversion techniques, this approach has the potential to provide real-time measurement of pulse-to-pulse variations in the spectral phase and coherence properties of exotic light sources.
Slow-light vortices in periodic waveguides
Publisher: IOP Publishing
Date: 05-08-2009
Demonstration of optically controlled beam steering in dynamic photonic lattices
Publisher: IEEE
Date: 2006
Nonlinear diffusion and beam self-trapping in diffraction-managed waveguide arrays
Publisher: The Optical Society
Date: 17-07-2007
DOI: 10.1364/OE.15.009547
Abstract: We study nonlinear propagation of light in diffraction-managed photonic lattices created by periodically-curved arrays of optical waveguides. We identify different regimes of the nonlinear propagation of light in such structures depending on the input power. We start from the regime of self-collimation at low powers and demonstrate that, as the beam power increases, nonlinearity destroys the beam self-imaging and leads to nonlinear diffusion. At higher powers, we observe a sharp transition to the self-trapping and the formation of discrete diffraction-managed solitons.
Effect of loss on photon-pair generation in nonlinear waveguide arrays
Publisher: American Physical Society (APS)
Date: 21-10-2014
Beam shaping by a periodic structure with negative refraction
Publisher: AIP Publishing
Date: 27-05-2003
DOI: 10.1063/1.1579849
Abstract: We analyze transmission of a layered photonic structure (a one-dimensional photonic crystal) consisting of alternating slabs of two materials with positive and negative refractive index. For the periodic structure with zero averaged refractive index, we demonstrate a number of unique properties of the beam transmission observed in strong beam modification and reshaping.
A Recipe for Success? A Nutrient Analysis of Recipes Promoted by Supermarkets
Publisher: MDPI AG
Date: 08-06-2020
Abstract: Recipe use impacts eating habits, yet there is limited research investigating the nutritional quality of recipes. Supermarket recipe magazines command large readerships, with over 4 million readers for each of the two major Australian supermarket publications. Assessing the nutrient content of featured recipes is therefore of public health interest. The nutrient content of 312 main-meal recipes from Coles® Magazine and Woolworths Fresh® were analyzed and compared against a traffic-light system for classifying nutrients of concern in chronic disease. Nutrient content was compared across recipe type (standard, advertorial and celebrity) and between recipes with and without health or nutrient claims. Overall compliance with the traffic-light criteria was low, with less than half of recipes meeting the target. Advertorial recipes had a higher energy (p = 0.001), saturated fat (p = 0.045) and sodium (p ≤ 0.001) content per serve, and per 100 g for sodium (p ≤ 0.001) compared to standard and celebrity recipes. Recipes with claims had greater compliance to the nutrient criteria (p 0.001) compared to those without. These findings support previous research highlighting the poor nutritional quality of published recipes from a variety of sources.
Stationary optical clusters in nonlinear media
Publisher: IEEE
Date: 2005
Polychromatic solitons and symmetry breaking in curved waveguide arrays
Publisher: The Optical Society
Date: 23-04-2010
DOI: 10.1364/OL.35.001371
Single-photon spontaneous parametric down-conversion in quadratic nonlinear waveguide arrays
Publisher: Elsevier BV
Date: 09-2014
Multistep parametric processes in nonlinear optics
Publisher: Elsevier
Date: 2005
Nonlinear spectral demultiplexing in arrays of curved waveguides
Publisher: IEEE
Date: 06-2009
Parametric localized modes in quadratic nonlinear photonic structures
Publisher: American Physical Society (APS)
Date: 27-12-2000
Broadband on-chip polarization mode splitters in lithium niobate integrated adiabatic couplers
Publisher: The Optical Society
Date: 25-01-2022
DOI: 10.1364/OE.27.001632
Biometric relationships and sex ratio for red-spotted shrimp Farfantepenaeus brasiliensis (Latreille, 1817) (Decapoda, Penaeidae) from the coast of Sergipe, northeastern Brazil
Publisher: FapUNIFESP (SciELO)
Date: 2021
Surface waves in two-dimensional modulated photonic lattices
Publisher: IEEE
Date: 05-2011
Spontaneous photon-pair generation from a dielectric nanoantenna
Publisher: The Optical Society
Date: 04-11-2019
Nonlinear pulse transformation and phase transitions in LiNbO<inf>3</inf> waveguide arrays
Publisher: IEEE
Date: 05-2011
Generation of Nonclassical Biphoton States through Cascaded Quantum Walks on a Nonlinear Chip
Publisher: American Physical Society (APS)
Date: 14-07-2014
Photon pair generation and quantum walks in arrays of quadratic nonlinear waveguides
Publisher: IEEE
Date: 05-2011
Optical Tamm states in arrays of all-dielectric nanoparticles
Publisher: Pleiades Publishing Ltd
Date: 12-2014
SELF-WRITTEN WAVEGUIDES IN PHOTOSENSITIVE MATERIALS
Publisher: World Scientific Pub Co Pte Lt
Date: 12-2002
DOI: 10.1142/S0218863502001115
Abstract: We present an overview of the physics of self-written waveguides created in photosensitive optical materials, including the experimental observations and the corresponding theoretical models for describing the growth of both bright and dark self-written beams. We discuss in more details the properties of self-written waveguides created in photosensitive polymers, which have been discovered in the recent experimental and theoretical studies. The self-writing process is essentially a nonlinear phenomenon, since the temporal dynamics depends on the optical exposure. Under appropriate conditions, permanent large changes in the refractive index are induced along the propagation direction of an optical beam, so that optical channels, or "filaments", appear as waveguides becoming "frozen" in a photosensitive material. We describe the growth of in idual filaments as well as the interaction of several filaments, also making a comparison between the physics of self-written waveguides and the concept of spatial optical solitons in self-focusing nonlinear media.
Nonlinear control of multicolor beams in coupled optical waveguides
Publisher: Springer New York
Date: 2012
Nonlinear switching and reshaping of slow-light pulses in Bragg-grating couplers
Publisher: The Optical Society
Date: 26-08-2008
Asymmetric multiband coupling in one-dimensional nonlinear photonic crystals
Publisher: IEEE
Date: 2005
Plasmonic Bloch oscillations in chirped metal-dielectric structures
Publisher: AIP Publishing
Date: 20-04-2009
DOI: 10.1063/1.3119666
Abstract: We study the propagation of plasmon polaritons in one-dimensional chirped metal-dielectric layered structures. We find an optical Wannier–Stark ladder in the mode spectrum and analyze Bloch oscillations associated with the coupling of surface plasmons localized at the metal-dielectric interfaces. For long structures, we find that the energy flow may dramatically change its direction, thus providing possibilities for the beam steering in the transmission band.
Observation of light localization in modulated Bessel optical lattices
Publisher: The Optical Society
Date: 2006
DOI: 10.1364/OE.14.002825
Abstract: We generate higher-order azimuthally modulated Bessel optical lattices in photorefractive crystals by employing a phase-imprinting technique. We report on the experimental observation of self-trapping and nonlinear localization of light in such segmented lattices in the form of ring-shaped and single-site states. The experimental results agree well with numerical simulations accounting for an anisotropic and spatially nonlocal nonlinear response of photorefractive crystals.
Assessing the Population Structure of the Southern Brown Shrimp Farfantepenaeus subtilis (Pérez-Farfante 1967) Using Different Sampling Methods
Publisher: Springer Science and Business Media LLC
Date: 04-11-2022
Nonlinear surface waves in arrays of curved waveguides
Publisher: Elsevier BV
Date: 05-2010
Nonlinear suppression of time reversals in PT-symmetric optical couplers
Publisher: American Physical Society (APS)
Date: 13-10-2010
Bloch-mode analysis for effective parameters restoration
Publisher: AIP
Date: 2012
DOI: 10.1063/1.4750122
Loss compensation in metal-dielectric layered metamaterials
Publisher: American Physical Society (APS)
Date: 27-03-2013
Compact surface fano states embedded in the continuum of waveguide arrays
Publisher: American Physical Society (APS)
Date: 10-12-2013
Slow-light vortices in periodic waveguides
Publisher: SPIE
Date: 12-02-2009
DOI: 10.1117/12.816331
Gain-induced compensation of losses in metal-dielectric metamaterials
Publisher: AIP
Date: 2012
DOI: 10.1063/1.4750129
Coherent perfect absorption and reflection in slow-light waveguides
Publisher: The Optical Society
Date: 20-11-2013
DOI: 10.1364/OL.38.004970
Modulated nanowire couplers for ultrashort pulses
Publisher: IEEE
Date: 05-2011
Polychromatic interface solitons in nonlinear photonic lattices
Publisher: The Optical Society
Date: 11-10-2006
DOI: 10.1364/OL.31.003125
Abstract: We demonstrate that interfaces between two nonlinear periodic photonic lattices offer unique possibilities for controlling the nonlinear interaction between different spectral components of polychromatic light, and a change in the light spectrum can have a dramatic effect on the propagation along the interface. We predict the existence of polychromatic surface solitons that differ fundamentally from their counterparts in infinite lattices.
Multistep cascading and fourth-harmonic generation
Publisher: Elsevier BV
Date: 03-2001
Wave scattering by metamaterial wedges and interfaces
Publisher: Wiley
Date: 2006
DOI: 10.1002/JNM.602
Population structure of Hepatus pudibundus (Decapoda: Aethridae) off the coast of Sergipe State, northeastern Brazil
Publisher: FapUNIFESP (SciELO)
Date: 2020
Scattering of the discrete solitons on the $\mathcal {PT}$ -symmetric defects
Publisher: IOP Publishing
Date: 12-2012
Bifurcations and stability of gap solitons in periodic potentials
Publisher: American Physical Society (APS)
Date: 30-09-2004
Multigap Discrete Vector Solitons
Publisher: American Physical Society (APS)
Date: 10-09-2003
Realization of Reflectionless Potentials in Photonic Lattices
Publisher: American Physical Society (APS)
Date: 12-05-2011
Soliton mobility in optically-induced nonlinear lattices
Publisher: IEEE
Date: 2005
Approximate solutions and scaling transformations for quadratic solitons
Publisher: American Physical Society (APS)
Date: 04-2000
Abstract: We study quadratic solitons supported by two- and three-wave parametric interactions in chi((2)) nonlinear media. Both planar and two-dimensional cases are considered. We obtain very accurate, "almost exact," explicit analytical solutions, matching the actual bright soliton profiles, with the help of a specially developed approach, based on analysis of the scaling properties. Additionally, we use these approximations to describe the linear tails of solitary waves which are related to the properties of the soliton bound states.
Coupled-mode theory for nonlinear plasmonic structures and metamaterials
Publisher: IEEE
Date: 09-2013
Harmonic Generation with Single-Cycle Light Pulses
Publisher: EDP Sciences
Date: 2013
Slow-Light Optical Bullets in Arrays of Nonlinear Bragg-Grating Waveguides
Publisher: American Physical Society (APS)
Date: 04-12-2006
Analytical study of pulse amplification in silicon Raman amplifiers
Publisher: The Optical Society
Date: 12-08-2010
DOI: 10.1364/OE.18.018324
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