ORCID Profile
0000-0002-7299-4900
Current Organisation
University of Melbourne
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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)
Optics And Opto-Electronic Physics | Optical Physics | Photonics, Optoelectronics and Optical Communications | Atomic, Molecular, Nuclear, Particle and Plasma Physics | Nanotechnology | Optical Properties of Materials | Macromolecular and Materials Chemistry | Theory and Design of Materials | Signal Transduction | Nanotechnology | Biosensor Technologies | Quantum Optics | Medical Biotechnology Diagnostics (incl. Biosensors) | Classical and Physical Optics | Atomic And Molecular Physics | Quantum Optics And Lasers
ANZSRC Socio-Economic Objective (SEO)
Physical sciences | Communication Networks and Services not elsewhere classified | Biological sciences | Integrated circuits and devices | Chemical sciences | Expanding Knowledge in Technology | Scientific instrumentation | Information and Communication Services not elsewhere classified | Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in the Physical Sciences | Expanding Knowledge in the Biological Sciences | Health not elsewhere classified |
Related Links
Publications
Characterisation of gold surface plasmon resonance sensor substrates
Publisher: Elsevier BV
Date: 02-2008
X-ray phase-contrast microscopy and microtomography
Publisher: Optica Publishing Group
Date: 22-09-2003
DOI: 10.1364/OE.11.002289
Abstract: In-line phase contrast enables weakly absorbing specimens to be imaged successfully with x-rays, and greatly enhances the visibility of fine scale structure in more strongly absorbing specimens. This type of phase contrast requires a spatially coherent beam, a condition that can be met by a microfocus x-ray source. We have developed an x-ray microscope, based on such a source, which is capable of high resolution phase-contrast imaging and tomography. Phase retrieval enables quantitative information to be recovered from phase-contrast microscope images of homogeneous s les of known composition and density, and improves the quality of tomographic reconstructions.
Ultrafast vector imaging of plasmonic skyrmion dynamics with deep subwavelength resolution
Publisher: American Association for the Advancement of Science (AAAS)
Date: 24-04-2020
Abstract: Skyrmions are stable topological textures that arise from solutions of the electromagnetic field. Because these “hedgehog”-like textures are robust, can be manipulated, and can interact, there is an interest in pursuing them for memory and logic applications. Skyrmions can also be generated in thin metal layers under optical excitation, but detailed information about the vectorial dynamics of these surface plasmon polariton skyrmions is so far lacking. Davis et al. used a time-resolved photoelectron vector microscope to image their spatiotemporal dynamics, piecing together movies as the skyrmions propagated across the surface of a perfect gold crystal. Access to dynamics with such high spatial and temporal resolution could help in controlling other nanophotonic systems. Science , this issue p. eaba6415
ELASTIC VIBRATIONS OF RODS AND POISSONS RATIO
Publisher: American Association of Physics Teachers (AAPT)
Date: 02-1983
DOI: 10.1119/1.13315
Abstract: We describe a simple experiment using a stereo phonograph cartridge for observing the longitudinal and torsional vibrations of a cylindrical rod. The elastic properties of the rod may thus be determined from measurements of its natural frequencies. Poisson’s ratio, in particular, is determined to high precision directly from a simple frequency ratio.
Interaction of molecules with localized surface plasmons in metallic nanoparticles
Publisher: American Physical Society (APS)
Date: 29-01-2010
Modelling the diffraction of laser-cooled atoms from magnetic gratings
Publisher: Springer Science and Business Media LLC
Date: 04-2001
THE MEASUREMENT OF DEFECT PARAMETERS IN IMPERFECT CRYSTALS USING X-RAY-DIFFRACTION
Publisher: International Union of Crystallography (IUCr)
Date: 09-1993
Surface Plasmon Mediated Strong Exciton-Photon Coupling in Semiconductor Nanocrystals
Publisher: American Chemical Society (ACS)
Date: 15-12-2010
DOI: 10.1021/NL903455Z
Abstract: We present an experimental demonstration of strong coupling between a surface plasmon propagating on a planar silver thin film and the lowest excited state of CdSe nanocrystals. Attenuated total reflection measurements demonstrate the formation of plasmon-exciton mixed states, characterized by a Rabi splitting of approximately 112 meV at room temperature. Such a coherent interaction has the potential for the development of nonlinear plasmonic devices, and furthermore, this system is akin to those studied in cavity quantum electrodynamics, thus offering the possibility to study the regime of strong light-matter coupling in semiconductor nanocrystals under easily accessible experimental conditions.
Aligned Linear Arrays of Crystalline Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 03-06-2013
DOI: 10.1021/JZ400716J
Abstract: Fabrication of one-dimensional arrays of crystalline nanoparticles with tunable particle size and spacing (down to 20 nm) is demonstrated. The in idual nanocrystals are pentagonal prisms, and the arrays are up to 11 μm in length, with some arrays containing >50 nanocrystals. Precise particle morphology and interparticle spacing can be maintained down the array. The far-field scattering spectra of the arrays show the near-fields of the nanocrystals are coupled. The method is fast and produces precise, well-defined, coupled plasmonic arrays with optical properties that match well to theory.
Evanescent coupling between a Raman-active molecule and surface plasmons in ensembles of metallic nanoparticles
Publisher: American Physical Society (APS)
Date: 23-11-2010
Direct measure of the phase shift of an x-ray beam
Publisher: Optica Publishing Group
Date: 06-1996
Waveguide-Plasmon Polariton Enhanced Photochemistry
Publisher: Wiley
Date: 15-07-2015
Electron-Beam-Induced Carbon Contamination on Silicon: Characterization Using Raman Spectroscopy and Atomic Force Microscopy
Publisher: Oxford University Press (OUP)
Date: 24-12-2010
DOI: 10.1017/S1431927609991206
Abstract: Electron-beam-induced carbon film deposition has long been recognized as a side effect of scanning electron microscopy. To characterize the nature of this type of contamination, silicon wafers were subjected to prolonged exposure to 15 kV electron beam energy with a probe current of ∼300 pA. Using Raman spectroscopy, the deposited coating was identified as an amorphous carbon film with an estimated crystallite size of 125 Å. Using atomic force microscopy, the cross-sectional profile of the coating was found to be raised and textured, indicative of the beam raster pattern. A map of the Raman intensity across the coating showed increased intensity along the edges and at the corner of the film. The intensity profile was in excess of that which could be explained by thickness alone. The enhancement was found to correspond with a modeled local field enhancement induced by the coating boundary and showed that the deposited carbon coating generated a localized disturbance in the opto-electrical properties of the substrate, which is compared and contrasted with Raman edge enhancement that is produced by surface structure in silicon.
Interaction of localized surface plasmons with chiral molecules
Publisher: American Physical Society (APS)
Date: 15-12-2014
Surface plasmon modes in multi-layer thin-films
Publisher: Elsevier BV
Date: 2009
Symmetry effects on the optical coupling between plasmonic nanoparticles with applications to hierarchical structures
Publisher: American Physical Society (APS)
Date: 16-02-2010
A SIMPLE OPTICAL TRANSDUCER FOR THE MEASUREMENT OF SMALL VIBRATION AMPLITUDES
Publisher: IOP Publishing
Date: 11-1985
Optical image processing with metasurface dark modes
Publisher: The Optical Society
Date: 22-08-2018
A UNIFIED TREATMENT OF SMALL-ANGLE X-RAY-SCATTERING, X-RAY REFRACTION AND ABSORPTION USING THE RYTOV APPROXIMATION
Publisher: International Union of Crystallography (IUCr)
Date: 11-1994
Real-Time Phase Imaging with an Asymmetric Transfer Function Metasurface
Publisher: American Chemical Society (ACS)
Date: 30-04-2022
Topology of Surface Plasmon Polaritons with Integer and Fractional Orbital Angular Momentum
Publisher: American Chemical Society (ACS)
Date: 26-09-2023
Strong chiral optical response from planar arrays of subwavelength metallic structures supporting surface plasmon resonances
Publisher: American Physical Society (APS)
Date: 13-08-2012
A hand-held surface plasmon resonance biosensor for the detection of ricin and other biological agents
Publisher: Elsevier BV
Date: 02-2008
DOI: 10.1016/J.BIOS.2007.11.005
Abstract: There is an ongoing need for field-deployable biosensor devices. We have constructed a fully self-contained, hand-held biosensor, based on the surface plasmon resonance technique. The dimensions of the sensor unit are 15 x 8 cm, the weight is 600 g and it is powered by a 9 V battery. We have characterised the responsiveness of the sensor using calibrated sucrose solutions and were able to measure changes as small as 3.3 x 10(-6) refractive index units. To demonstrate functionality of the sensor, we have prepared surfaces with an antibody fragment specific for the biological toxin ricin. We were able to detect ricin at 200 ng/mL in 10 min, which is approximately 2500 times less than the minimum lethal dose. We were also able to verify positive binding within a second 10 min window. This sensor demonstrates important steps required for the development of fully integrated, hand-held sensor devices and will form the basis of a multi-analyte system, to be developed in the near future. It also represents the first completely hand-held SPR device, not requiring external power or a computer connection to operate.
Tunable optical antennas enabled by the phase transition in vanadium dioxide
Publisher: The Optical Society
Date: 04-11-2013
DOI: 10.1364/OE.21.027503
Abstract: Optical antennas, subwavelength metallic structures resonating at visible frequencies, are a relatively new branch of antenna technology being applied in science, technology and medicine. Dynamically tuning the resonances of these antennas would increase their range of application and offer potential increases in plasmonic device efficiencies. Silver nanoantenna arrays were fabricated on a thin film of the phase change material vanadium dioxide (VO(2)) and the resonant wavelength of these arrays was modulated by increasing the temperature of the substrate above the critical temperature (approximately 68 °C). Depending on the array, wavelength modulation of up to 110 nm was observed.
X-Ray Image Contrast from a Simple Phase Object
Publisher: American Physical Society (APS)
Date: 17-04-1995
Brownian diffusion of nano-particles in optical traps
Publisher: Optica Publishing Group
Date: 2007
DOI: 10.1364/OE.15.002702
Abstract: The effect of thermal-induced motion on nano-particles in optical traps is examined theoretically. We derive the steady-state probability density for particles trapped by evanescent waves above a surface. In particular we investigate the enhancement of the gradient force by surface plasmon resonance in a gold film and its application to trapping nano-particles in solution. An expression is derived for the lifetime of nano-particles in the trap in terms of the ratio of the trap energy to the thermal energy. It is shown that this ratio should be 10 or greater for the nano-particles to remain in the trap.
Cathodoluminescence as a probe of the optical properties of resonant apertures in a metallic film
Publisher: Beilstein Institut
Date: 18-05-2018
DOI: 10.3762/BJNANO.9.140
Abstract: Here we present the results of an investigation of resonances of azimuthal trimer arrangements of rectangular slots in a gold film on a glass substrate using cathodoluminescence (CL) as a probe. The variation in the CL signal collected from specific locations on the s le as a function of wavelength and the spatial dependence of emission into different wavelength bands provides considerable insight into the resonant modes, particularly sub-radiant modes, of these apertures. By comparing our experimental results with electromagnetic simulations we are able to identify a Fabry–Pérot mode of these cavities as well as resonances associated with the excitation of surface plasmon polaritons on the air–gold boundary. We obtain evidence for the excitation of dark (also known as sub-radiant) modes of apertures and aperture ensembles.
DYNAMICAL X-RAY-DIFFRACTION FROM IMPERFECT CRYSTALS - A SOLUTION BASED ON THE FOKKER-PLANCK EQUATION
Publisher: International Union of Crystallography (IUCr)
Date: 03-1994
Coherent superposition of exciton states in quantum dots induced by surface plasmons
Publisher: AIP Publishing
Date: 15-02-2010
DOI: 10.1063/1.3313935
Material effects on V-nanoantenna performance
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4NR06650B
Abstract: Aluminum V-antennas on silicon display significant alterations to their plasmon resonances due to the presence of the optically-dense silicon substrate and adjacent antennas, as well as a high sensitivity to the substrate's native oxide layer. The effect of the aluminium band-gap is also shown to affect the V-antennas’ resonances.
A SIMPLE PARAMETERIZATION SCHEME FOR JOINT STATISTICS OF CLOUD FIELD MORPHOLOGY AND PHYSICAL PARAMETERS
Publisher: American Meteorological Society
Date: 08-1990
Plasmon Resonances in V-Shaped Gold Nanostructures
Publisher: Springer Science and Business Media LLC
Date: 03-11-2012
Measuring subwavelength phase differences with a plasmonic circuit - an example of nanoscale optical signal processing
Publisher: The Optical Society
Date: 14-05-2014
DOI: 10.1364/OL.39.002994
2D magnetic traps for ultra-cold atoms: a simple theory using complex numbers
Publisher: Springer Science and Business Media LLC
Date: 2002
Spatiotemporal Analysis of an Efficient Fresnel Grating Coupler for Focusing Surface Plasmon Polaritons
Publisher: American Chemical Society (ACS)
Date: 21-02-2019
Metasurfaces, dark modes, and high NA illumination
Publisher: The Optical Society
Date: 11-10-2018
Atom diffraction from magnetic gratings in the thin phase-grating approximation
Publisher: Springer Science and Business Media LLC
Date: 06-2001
Influence of Particle-Substrate Interaction on Localized Plasmon Resonances
Publisher: American Chemical Society (ACS)
Date: 17-05-2010
DOI: 10.1021/NL100423Z
Abstract: We present a theory for determining the localized surface plasmon resonance shifts of arbitrarily shaped metal nanoparticles on a substrate. Using a pseudoparticle concept, an expression for the particle-substrate interaction is derived, providing both physical insight and formulas to estimate the shifted plasmon resonance. The theory is verified against measured scattering spectra of nanorods on substrates. Simple formulas are provided to calculate the resonance of nanorods, spheres, and ellipsoids on dielectric substrate.
Colloquium: An algebraic model of localized surface plasmons and their interactions
Publisher: American Physical Society (APS)
Date: 30-01-2017
Plasmonics by design: design principles to structure-function relationships with assemblies of metal nanoparticles
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3TC32041C
JOINT DISTRIBUTION OF SIZE AND INFRARED OPTICAL-THICKNESS IN CUMULUS CLOUD FIELDS
Publisher: American Geophysical Union (AGU)
Date: 20-11-1990
Coupling modes of gold trimer superstructures
Publisher: The Royal Society
Date: 13-09-2011
Abstract: An experimental and theoretical examination of the coupling modes within superstructures of gold nanorod trimers is presented. The experimentally determined spectrum of the nanorod trimers is reported and the modes are elucidated using an electrostatic eigenmode method based on the coupling of evanescent electric fields. The theory is able to reproduce the experimental spectrum well, and the nature of the modes and interactions are discussed.
Surface plasmon resonances in strongly coupled gold nanosphere chains from monomer to hexamer
Publisher: American Chemical Society (ACS)
Date: 07-09-2011
DOI: 10.1021/NL202080A
Abstract: We present experimental data on the light scattering properties of linear chains of gold nanoparticles with up to six nanoparticles and an interparticle spacing of 1 nm. A red shift of the surface plasmon resonance with increasing chain length is observed. An exponential model applied to the experimental data allows determination of an asymptotic maximum resonance at a chain length of 10-12 particles. The optical data are compared with analytical and numerical calculation methods (EEM and BEM).
Quantitative X‐ray projection microscopy: phase‐contrast and multi‐spectral imaging
Publisher: Wiley
Date: 08-2002
DOI: 10.1046/J.1365-2818.2002.01046.X
Abstract: We outline a new approach to X-ray projection microscopy in a scanning electron microscope (SEM), which exploits phase contrast to boost the quality and information content of images. These developments have been made possible by the combination of a high-brightness field-emission gun (FEG)-based SEM, direct detection CCD technology and new phase retrieval algorithms. Using this approach we have been able to obtain spatial resolution of < 0.2 micro m and have demonstrated novel features such as: (i) phase-contrast enhanced visibility of high spatial frequency image features (e.g. edges and boundaries) over a wide energy range (ii) energy-resolved imaging to simultaneously produce multiple quasi-monochromatic images using broad-band polychromatic illumination (iii) easy implementation of microtomography (iv) rapid and robust phase/ litude-retrieval algorithms to enable new real-time and quantitative modes of microscopic imaging. These algorithms can also be applied successfully to recover object-plane information from intermediate-field images, unlocking the potentially greater contrast and resolution of the intermediate-field regime. Widespread applications are envisaged for fields such as materials science, biological and biomedical research and microelectronics device inspection. Some illustrative ex les are presented. The quantitative methods described here are also very relevant to projection microscopy using other sources of radiation, such as visible light and electrons.
Metasurfaces with Asymmetric Optical Transfer Functions for Optical Signal Processing
Publisher: American Physical Society (APS)
Date: 07-2019
All-optical modulation and switching by a metamaterial of plasmonic circuits
Publisher: The Optical Society
Date: 15-08-2014
DOI: 10.1364/OL.39.004938
Plasmonic Near-Complete Optical Absorption and Its Applications
Publisher: Wiley
Date: 02-05-2019
Optical metasurfaces for subwavelength difference operations
Publisher: AIP Publishing
Date: 31-10-2016
DOI: 10.1063/1.4966666
Abstract: Coupled metal nanostructures supporting localized surface plasmon resonances are represented as a nanoscale optical circuit that takes light fields as inputs and forms linear combinations of them with complex coefficients. The subwavelength arrays of these circuits form a metasurface that performs mathematical operations in two dimension on an incident light field. We demonstrate this concept with subwavelength scale plasmonic circuits that perform difference operations. The metasurface is fabricated from the arrays of coupled gold nanorods where each group of three rods forms the difference circuit. The operation of the metasurface is demonstrated experimentally.
Effect of retardation on localized surface plasmon resonances in a metallic nanorod
Publisher: Optica Publishing Group
Date: 10-12-2009
DOI: 10.1364/OE.17.023655
Applications of phase-contrast X-ray microscopy in an SEM
Publisher: EDP Sciences
Date: 03-2003
DOI: 10.1051/JP4:20030140
Macrochannelling: Characterisation of nano-structures by ion beam analysis
Publisher: Elsevier BV
Date: 04-2005
Atomic de Broglie waveguides and integrated atom-optics using permanent magnets
Publisher: IOP Publishing
Date: 08-1999
A NEW APPROACH FOR MAPPING X-RAY ROCKING CURVES
Publisher: AIP Publishing
Date: 07-1993
DOI: 10.1063/1.1144018
Abstract: A new experimental geometry for simultaneously mapping the rocking curves of a s le over a one- or two-dimensional array of points on the s le has been developed. The 422 asymmetric diffraction of Cu Kα1 radiation with a monolithic channel-cut silicon crystal angularly collimates and spatially expands the x-ray beam. A cooled Reticon linear photodiode array with 25-μm spatial resolution was used for the one-dimensional detector. Compared with the commonly used double-crystal diffractometer method, more information can be obtained from the present method, for ex le, characterization of the minute local misorientation of subgrains and the precise determination of the curvature of a crystal. The uniformity of the crystal quality and the local variation of the curvature of the crystal planes over a s le can also be revealed from the contour map of the rocking curves. Maps of the rocking curves of several s les have been collected using this method.
Highly compact refractive index sensor based on stripe waveguides for lab-on-a-chip sensing applications
Publisher: Beilstein Institut
Date: 25-05-2016
DOI: 10.3762/BJNANO.7.66
Abstract: In this paper we report the design and experimental realisation of a novel refractive index sensor based on coupling between three nanoscale stripe waveguides. The sensor is highly compact and designed to operate at a single wavelength. We demonstrate that the sensor exhibits linear response with a resolution of 6 × 10 −4 RIU (refractive index unit) for a change in relative output intensity of 1%. Authors expect that the outcome of this paper will prove beneficial in highly compact, label-free and highly sensitive refractive index analysis.
The Australian diffractometer at the Photon Factory
Publisher: AIP Publishing
Date: 1992
DOI: 10.1063/1.1143202
Abstract: Outlined are design features of a versatile high-resolution two-axis diffractometer that is being constructed for operation at the Photon Factory as an Australian national facility. The instrument features optional use of multiple-imaging plates on a translating cassette to allow rapid recording of an almost complete range of data covering both the high-angle and small-angle scattering regime or alternatively the use of electronic detectors. The instrument will be capable of operation in various modes including the following: (i) high-resolution powder diffraction with single-channel counter and crystal analyzer, (ii) high-resolution, high-speed powder diffraction in the Debye–Scherrer mode with imaging plates as recording medium, either stationary or translating (for time-dependent studies), (iii) small-angle x-ray scattering with imaging plates as recording medium, (iv) protein crystallography in screenless Weissenberg mode, and (v) two- or three-axis single-crystal diffractometry. The salient features of the instrument are the use of a double-crystal sagittal focusing monochromator as primary monochromator together with the optional use of a condensing–collimating channel-cut (CCCC) monochromator or other channel-cut monochromator as secondary monochromator. The use of a CCCC monochromator enables fine tuning of beam position on s le, harmonic suppression, beam-condensation, and variation of wavelength bandpass. Further features include the use of high-precision incremental encoders on both axes, together with the capability of operating the whole diffractometer, including secondary monochromator and detectors, in vacuum of order 10−3 Torr in order to reduce absorption and parasitic scattering, and the use of a large camera radius (approximately 0.57 m) for the imaging plate cassette in order to increase angular resolution and signal to noise.
MATHEMATICAL AND NUMERICAL-MODELS OF CDTE DEPOSITION IN A PRE-CRACKING METALORGANIC CHEMICAL-VAPOR-DEPOSITION REACTOR
Publisher: Elsevier BV
Date: 10-1993
Directing Energy into a Subwavelength Nonresonant Metasurface across the Visible Spectrum
Publisher: American Chemical Society (ACS)
Date: 07-01-2019
Location of Zn within the Mg-12(LaxCe1-x) lattice by X-ray incoherent channelling patterns
Publisher: International Union of Crystallography (IUCr)
Date: 27-04-2001
DOI: 10.1107/S0108767300019577
Abstract: Systematic electron diffraction studies on intermetallic precipitates formed within a lightweight Mg-RE-Zn alloy (RE = La or Ce) identify these to be of structural type Mn(12)Th (space group I4/mmm). Analytical electron microscopy yields an overall composition of Mg(12)(La(x)Ce(1-x)) with x ~ 0.43, with 1 at.% Zn incorporated within the lattice. Variations in characteristic X-ray emission rates, as an electron beam is rocked near zone-axis orientations, are used to form two-dimensional channelling patterns, termed X-ray incoherent channelling patterns. This channelling contrast enables a specific sublattice site that is occupied by Zn to be unambiguously identified within the Mg(12)RE lattice. The particular sublattice site is denoted by the Wyckoff letter f, and is one of the three different Mg sublattice sites f, i and j. Of these three sites, the Wigner-Seitz cell that is centred on the f sublattice site has the largest Mg-RE interatomic distance, and therefore the f site is expected to be favoured for accommodating the substitution of a larger Zn atom.
Silica‐overcoated substrates for detection of proteins by surface‐enhanced Raman spectroscopy
Publisher: Wiley
Date: 11-02-2008
DOI: 10.1002/JRS.1914
Plasmon Coupling of Gold Nanorods at Short Distances and in Different Geometries
Publisher: American Chemical Society (ACS)
Date: 09-03-2009
DOI: 10.1021/NL900034V
Abstract: The experimentally determined scattering spectra of discrete, crystalline, gold nanorod dimers arranged side-to-side, end-to-end, at right angles in different orientations and also with longitudinal offsets are reported along with the electron micrographs of the in idual dimers. The spectra exhibit both red- and blue-shifted surface plasmon resonances, consistent with the plasmon hybridization model. However, the plasmon coupling constant for gold dimers with less than a few nanometers separation between the particles does not obey the exponential dependence predicted by the Universal Plasmon Ruler equation. The experimentally determined spectra are compared with electrodynamic calculations and the interactions between the in idual rod plasmons in different dimer orientations are elucidated.
Optical investigation of the J-pole and Vee antenna families
Publisher: The Optical Society
Date: 14-01-2014
DOI: 10.1364/OE.22.001336
Dual resonance mechanisms facilitating enhanced optical transmission in coaxial waveguide arrays
Publisher: The Optical Society
Date: 11-04-2008
DOI: 10.1364/OL.33.000821
Abstract: We experimentally and computationally demonstrate high transmission through arrays of coaxial apertures with different geometries and arrangements in silver films. By studying both periodic and random arrangements of apertures, we were able to isolate transmission enhancement phenomena owing to surface plasmon effects from those owing to the excitation of cylindrical surface plasmons within the apertures themselves.
Designing plasmonic systems using optical coupling between nanoparticles
Publisher: American Physical Society (APS)
Date: 15-04-2009
Size Selective Adsorption of Gold Nanoparticles by Electrostatic Assembly
Publisher: American Chemical Society (ACS)
Date: 23-01-2017
ELECTRIC-FIELDS IN ACCELERATING CONDUCTORS
Publisher: IOP Publishing
Date: 07-1988
Picosecond Kinetics of Strongly Coupled Excitons and Surface Plasmon Polaritons
Publisher: American Chemical Society (ACS)
Date: 11-10-2013
DOI: 10.1021/JP306830S
Abstract: Coupling between excitons of CdSe nanocrystal quantum dots (NQDs) and surface plasmon polaritons (SPPs) of an Ag film attached to a prism have been studied by steady-state and transient reflectivity measurements in the Kretschmann geometry. In these experiments, the angle of incidence of the probe beam selects hybrid exciton/SPP states with different wavevectors and exciton/SPP compositions. The dynamics measured in the transient reflectivity experiments are sensitive to the composition of the hybrid states. Specifically, fast dynamics are observed at probe wavevectors where the lower hybrid state has predominant SPP character. In contrast, at probe wavevectors where the lower hybrid state is predominantly excitonic, the dynamics are similar to that measured for CdSe NQDs on glass.
Modelling structural colour from helicoidal multi-layer thin films with natural disorder
Publisher: Optica Publishing Group
Date: 16-10-2023
DOI: 10.1364/OE.503881
Large-Area Nanofabrication of Partially Embedded Nanostructures for Enhanced Plasmonic Hot-Carrier Extraction
Publisher: American Chemical Society (ACS)
Date: 25-02-2019
Printing via hot embossing of optically variable images in thermoplastic acrylic lacquer
Publisher: Elsevier BV
Date: 10-2006
PHASE-CONTRAST IMAGING OF WEAKLY ABSORBING MATERIALS USING HARD X-RAYS
Publisher: Springer Science and Business Media LLC
Date: 02-1995
DOI: 10.1038/373595A0
A plasmonic ac Wheatstone bridge circuit for high-sensitivity phase measurement and single-molecule detection
Publisher: AIP Publishing
Date: 15-08-2009
DOI: 10.1063/1.3195071
Abstract: In this paper, a plasmonic “ac Wheatstone bridge” circuit is proposed and theoretically modeled for the first time. The bridge circuit consists of three metallic nanoparticles, shaped as rectangular prisms, with two nanoparticles acting as parallel arms of a resonant circuit and the third bridging nanoparticle acting as an optical antenna providing an output signal. Polarized light excites localized surface plasmon resonances in the two arms of the circuit, which generate an optical signal dependent on the phase-sensitive excitations of surface plasmons in the antenna. The circuit is analyzed using a plasmonic coupling theory and numerical simulations. The analyses show that the plasmonic circuit is sensitive to phase shifts between the arms of the bridge and has the potential to detect the presence of single molecules.
ELASTIC-MODULI OF SOLIDS - A METHOD SUITABLE FOR HIGH-TEMPERATURE MEASUREMENTS
Publisher: IOP Publishing
Date: 12-1986
Vanadium dioxide thickness effects on tunable optical antennas
Publisher: SPIE
Date: 07-12-2013
DOI: 10.1117/12.2033739
Analytical Model of the Three-Dimensional Plasmonic Ruler
Publisher: American Chemical Society (ACS)
Date: 19-01-2012
DOI: 10.1021/NN204029P
Abstract: An electrostatic eigenmode method that describes the coupling between plasmonic nanoparticles is used to model the optical resonances of the 3D plasmonic ruler. The model provides a mathematical description of the ruler that enables us to identify the key resonance in the scattering spectrum that encodes the location of the central nanorod. The model demonstrates excellent agreement with experimentally measured spectra. We show that the spectra can uniquely encode the horizontal and vertical displacements of the central nanorod. From an understanding of the spatial dependence of the plasmonic coupling between the nanorods, we devise a method for estimating the position of the central nanorod and apply this to experimental data. Our method paves the way toward the use of high-resolution spectra from 3D plasmonic oligomers for structural analysis of single entities such as complex macromolecules, DNA scaffolds, proteins, and peptides.
Fast decomposition of digital curves into polygons using the Haar transform
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 1999
DOI: 10.1109/34.784293
X-RAY PROPAGATION AND DIFFRACTION IN DISTORTED, ANISOTROPIC, DIELECTRIC AND MAGNETIC CRYSTALS
Publisher: International Union of Crystallography (IUCr)
Date: 05-1995
Meta-optical and thin film devices for all-optical information processing
Publisher: AIP Publishing
Date: 19-08-2021
DOI: 10.1063/5.0048758
Abstract: All-optical spatial frequency filtering has a long history with many applications now commonly replaced with digital alternatives. Although optical approaches are attractive in that they minimize energy requirements and images can be manipulated in real time, they are relatively bulky compared to the compact electronic devices that are now ubiquitous. With emerging interest in nanophotonic approaches to all-optical information processing, these approaches to enhancing images and performing phase visualization are attracting significant interest. Metasurfaces have been demonstrated as tailored alternatives to conventional spatial filters, but utilizing the spatial frequency sensitivity of these and thin film devices also has the potential to form the basis for ultracompact approaches to image processing. There are, however, significant challenges remaining to realize this promise. This review summarizes the current status of research in this rapidly growing field, places it in the context of the history of all-optical spatial filtering, and assesses prospects for future directions.
Physical mechanisms behind the SERS enhancement of pyramidal pit substrates
Publisher: Wiley
Date: 13-01-2010
DOI: 10.1002/JRS.2557
Simple Model for the Hybridization of Surface Plasmon Resonances in Metallic Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 14-06-2010
DOI: 10.1021/NL101335Z
Abstract: An "electrostatic" eigenmode method based on the coupling of evanescent electric fields is presented for modeling the hybridization of localized surface plasmon resonances in metallic nanoparticles of arbitrary shape. The method yields simple analytical expressions for the hybridized energies and excitation litudes of nanoparticle ensembles. Because of its ease of applicability and simple conceptual basis, we anticipate that the method will be of value in understanding and predicting the effects of interacting plasmonic nanoparticles.
FRET for lab-on-a-chip devices — current trends and future prospects
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/B924271F
Abstract: This review focuses on the use of Förster Resonance Energy Transfer (FRET) to monitor intra- and intermolecular reactions occurring in microfluidic reactors. Microfluidic devices have recently been used for performing highly efficient and miniaturised biological assays for the analysis of biological entities such as cells, proteins and nucleic acids. Microfluidic assays are characterised by nanolitre to femtolitre reaction volumes, which necessitates the adoption of a sensitive optical detection scheme. FRET serves as a strong 'spectroscopic ruler' for elucidating the tertiary structure of biomolecules, as the efficiency of the non-radiative energy transfer is extremely sensitive to nanoscale changes in the separation between donor and acceptor markers attached to the biomolecule of interest. In this review, we will review the implementation of various microfluidic assays which employ FRET for erse applications in the biomedical field, along with the advantages and disadvantages of the various approaches. The future prospects for development of microfluidic devices incorporating FRET detection will be discussed.
Superchiral electromagnetic fields created by surface plasmons in nonchiral metallic nanostructures
Publisher: American Physical Society (APS)
Date: 05-02-2013
A COMPARISON BETWEEN CCCC AND SYMMETRICAL SILICON MONOCHROMATORS
Publisher: Elsevier BV
Date: 11-1990
Subfemtosecond and Nanometer Plasmon Dynamics with Photoelectron Microscopy: Theory and Efficient Simulations
Publisher: American Chemical Society (ACS)
Date: 25-09-2017
Modeling and fabrication of tuned circuits for optical meta-materials - art. no. 60380Y
Publisher: SPIE
Date: 28-12-2006
DOI: 10.1117/12.637871
Excitation of bound plasmons along nanoscale stripe waveguides: a comparison of end and grating coupling techniques
Publisher: The Optical Society
Date: 13-04-2015
DOI: 10.1364/OE.23.010188
Optical absorption by surface plasmons in deep sub-wavelength channels
Publisher: Elsevier BV
Date: 11-2006
Plasmonics - the convergence between optics and electronics
Publisher: SPIE
Date: 07-12-2013
DOI: 10.1117/12.2044696
Semiclassical Plexcitonics: Simple Approach for Designing Plexcitonic Nanostructures
Publisher: American Chemical Society (ACS)
Date: 10-2014
DOI: 10.1021/JP506402M
Mesoscale surface plasmons: modelling and imaging using near-field scanning optical microscopy
Publisher: The Optical Society
Date: 28-08-2018
DOI: 10.1364/OE.26.023426
The plasmonic J-pole antenna
Publisher: AIP Publishing
Date: 21-01-2013
DOI: 10.1063/1.4775382
Abstract: The plasmonic J-pole antenna is the nanoscale version of a radio frequency design, consisting of a half wavelength arm connected to a quarter wavelength feed pair. Here, we report on an optical J-pole antenna that displays both a dipole (1015 nm) and quadrupole resonance (653 nm). The excitation of the quadrupole resonance is optimum at an angle of incidence directly related to the geometry of the antenna, demonstrating the flexibility of the design. The J-pole antenna shows great promise for enhancing and shaping the angular emission pattern of quantum emitters.
Hot Carrier Extraction with Plasmonic Broadband Absorbers
Publisher: American Chemical Society (ACS)
Date: 21-03-2016
Abstract: Hot charge carrier extraction from metallic nanostructures is a very promising approach for applications in photocatalysis, photovoltaics, and photodetection. One limitation is that many metallic nanostructures support a single plasmon resonance thus restricting the light-to-charge-carrier activity to a spectral band. Here we demonstrate that a monolayer of plasmonic nanoparticles can be assembled on a multistack layered configuration to achieve broadband, near-unit light absorption, which is spatially localized on the nanoparticle layer. We show that this enhanced light absorbance leads to ∼40-fold increases in the photon-to-electron conversion efficiency by the plasmonic nanostructures. We developed a model that successfully captures the essential physics of the plasmonic hot electron charge generation and separation in these structures. This model also allowed us to establish that efficient hot carrier extraction is limited to spectral regions where (i) the photons have energies higher than the Schottky junctions and (ii) the absorption of light is localized on the metal nanoparticles.
Nanometers to centimeters: Novel optical nano-antennas, with an eye to scaled production
Publisher: SPIE
Date: 14-03-2016
DOI: 10.1117/12.2210769
Surface plasmon hybridization and exciton coupling
Publisher: American Physical Society (APS)
Date: 09-07-2012
Simulations of the effect of waveguide cross-section on quantum dot–plasmon coupling
Publisher: AIP Publishing
Date: 10-2011
DOI: 10.1063/1.3650900
Abstract: Quantum dot–plasmon waveguide systems are of interest for the active control of plasmon propagation, and consequently, the development of active nanophotonic devices such as nano-sized optical transistors. This paper is concerned with how varying aspect ratio of the waveguide cross-section affects the quantum dot–plasmon coupling. We compare a stripe waveguide with an equivalent nanowire, illustrating that both waveguides have a similar coupling strength to a nearby quantum dot for small waveguide cross-section, thereby indicating that stripe lithographic waveguides have strong potential use in quantum dot–plasmon waveguide systems. We also demonstrate that changing the aspect ratio of both stripe and wire waveguides can increase the spontaneous emission rate of the quantum dot into the plasmon mode, by up to a factor of five. The results of this paper will contribute to the optimisation of quantum dot–plasmon waveguide systems and help pave the way for the development of active nanophotonics devices.
A compact interferometric sensor design using three waveguide coupling
Publisher: AIP Publishing
Date: 15-11-2009
DOI: 10.1063/1.3262625
Abstract: The use of metal stripes for the guiding of plasmons is a well established technique for the infrared regime and has resulted in the development of a myriad of passive optical components and sensing devices. However, the plasmons suffer from large losses around sharp bends, making the compact design of nanoscale sensors and circuits problematic. A compact alternative would be to use evanescent coupling between two sufficiently close stripes, and thus we propose a compact interferometer design using evanescent coupling. The sensitivity of the design is compared with that achieved using a hand-held sensor based on the Kretschmann style surface plasmon resonance technique. Modeling of the new interferometric sensor is performed for various structural parameters using finite-difference time-domain and COMSOL Multiphysics. The physical mechanisms behind the coupling and propagation of plasmons in this structure are explained in terms of the allowed modes in each section of the device.
Collective excitation of plasmonic hot-spots for enhanced hot charge carrier transfer in metal/semiconductor contacts
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR01592H
Abstract: We show how a combination of near- and far-field coupling of the localised surface plasmon resonances in aluminium nanoparticles deposited on TiO2 films greatly enhances the visible light photocatalytic activity of the semiconductor material. We demonstrate two orders of magnitude enhancement in the rate of decomposition of methylene blue under visible light illumination when the surface of TiO2 films is decorated with gratings of Al nanoparticle dimers.
Selective near-perfect absorbing mirror as a spatial frequency filter for optical image processing
Publisher: AIP Publishing
Date: 10-2019
DOI: 10.1063/1.5113650
Abstract: Spatial frequency filtering is a fundamental enabler of information processing methods in biological and technical imaging. Most filtering methods, however, require either bulky and expensive optical equipment or some degree of computational processing. Here, we experimentally demonstrate real-time, on-chip, all-optical spatial frequency filtering using a thin-film perfect absorber structure. We experimentally demonstrate edge enhancement of an litude image and conversion of phase gradients to intensity modulation in an image. The device is used to demonstrate enhancement of an image of pond algae.
Surface plasmon modes and their interactions in multilayer thin-film structures
Publisher: SPIE
Date: 20-08-2009
DOI: 10.1117/12.824850
Imaging the Nonlinear Plasmoemission Dynamics of Electrons from Strong Plasmonic Fields
Publisher: American Chemical Society (ACS)
Date: 04-10-2017
DOI: 10.1021/ACS.NANOLETT.7B02235
Abstract: We use subcycle time-resolved photoemission microscopy to unambiguously distinguish optically triggered electron emission (photoemission) from effects caused purely by the plasmonic field (termed "plasmoemission"). We find from time-resolved imaging that nonlinear plasmoemission is dominated by the transverse plasmon field component by utilizing a transient standing wave from two counter-propagating plasmon pulses of opposite transverse spin. From plasmonic foci on flat metal surfaces, we observe highly nonlinear plasmoemission up to the fifth power of intensity and quantized energy transfer, which reflects the quantum-mechanical nature of surface plasmons. Our work constitutes the basis for novel plasmonic devices such as nanometer-confined ultrafast electron sources as well as applications in time-resolved electron microscopy.
A STOCHASTIC-MODEL FOR X-RAY-DIFFRACTION FROM IMPERFECT CRYSTALS
Publisher: International Union of Crystallography (IUCr)
Date: 11-1992
Plasmene Metasurface Absorbers: Electromagnetic Hot Spots and Hot Carriers
Publisher: American Chemical Society (ACS)
Date: 22-01-2019
Predicting the localized surface plasmon resonances of spherical nanoparticles on a substrate: Electrostatic eigenmode method
Publisher: American Chemical Society (ACS)
Date: 05-12-2012
DOI: 10.1021/JP307510E
The Dark Side of Plasmonics
Publisher: American Chemical Society (ACS)
Date: 08-07-2013
DOI: 10.1021/NL401656E
Abstract: Plasmonic dark modes are pure near-field modes that can arise from the plasmon hybridization in a set of interacting nanoparticles. When compared to bright modes, dark modes have longer lifetimes due to their lack of a net dipole moment, making them attractive for a number of applications. We demonstrate the excitation and optical detection of a collective dark plasmonic mode from in idual plasmonic trimers. The trimers consist of triangular arrangements of gold nanorods, and due to this symmetry, the lowest-energy dark plasmonic mode can interact with radially polarized light. The experimental data presented confirm the excitation of this mode, and its assignment is supported with an electrostatic approximation wherein these dark modes are described in terms of plasmon hybridization. The strong confinement of energy in these modes and their associated near fields hold great promise for achieving strong coupling to single photon emitters.
Precision Plasmonics with Monomers and Dimers of Spherical Gold Nanoparticles: Nonequilibrium Dynamics at the Time and Space Limits
Publisher: American Chemical Society (ACS)
Date: 17-04-2019
Plasmonic Edge States: An Electrostatic Eigenmode Description
Publisher: American Chemical Society (ACS)
Date: 16-06-2017
A localized surface plasmon resonance-based optical fiber sensor with sub-wavelength apertures
Publisher: AIP Publishing
Date: 04-11-2013
DOI: 10.1063/1.4829530
Fano resonances in three-dimensional dual cut-wire pairs
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3NR06547B
Abstract: This paper presents an experimental demonstration of pronounced Fano resonances in a remarkably simple, three-dimensional (3D) plasmonic system, composed of two groups of paired cut-wires with different sizes.
Chiral Electromagnetic Fields Generated by Arrays of Nanoslits
Publisher: American Chemical Society (ACS)
Date: 11-06-2012
DOI: 10.1021/NL3012787
Micron-scale magnetic structures for atom optics
Publisher: Elsevier BV
Date: 06-2001
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