ORCID Profile
0000-0002-3505-9163
Current Organisation
RMIT 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)
Photonics, Optoelectronics and Optical Communications | Quantum Physics | Optical Physics | Quantum Information, Computation and Communication | Condensed Matter Physics not elsewhere classified | Nanotechnology | Quantum Optics And Lasers | Quantum Optics | Nanobiotechnology | Atomic And Molecular Physics | Photonics and Electro-Optical Engineering (excl. Communications) | Optical Properties of Materials | Condensed Matter Physics | Atmospheric Sciences | Quantum Physics not elsewhere classified | Climate Change Processes | Medical Biotechnology | Functional Materials | Compound Semiconductors | Elemental Semiconductors | Materials Engineering | Theoretical Physics | Composite and Hybrid Materials | Medical Biotechnology Diagnostics (incl. Biosensors) | Lasers and Quantum Electronics | Optics And Opto-Electronic Physics | Biomedical Instrumentation | Biologically Active Molecules | Nanophotonics | Nanoscale Characterisation | Optical Physics not elsewhere classified | Nanomaterials | Theoretical and Computational Chemistry not elsewhere classified | Surfaces and Structural Properties of Condensed Matter | Electronic and Magnetic Properties of Condensed Matter; Superconductivity | Microwave and Millimetrewave Theory and Technology
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in the Physical Sciences | Expanding Knowledge in Technology | Expanding Knowledge in the Chemical Sciences | Expanding Knowledge in Engineering | Emerging Defence Technologies | Physical sciences | Scientific Instruments | Computer hardware and electronic equipment not elsewhere classified | Climate Change Models | Expanding Knowledge in the Medical and Health Sciences | Scientific instrumentation | Modules—special and attached processors | Expanding Knowledge in the Biological Sciences |
Related Links
Publications
Optical cryocooling of diamond
Publisher: American Physical Society (APS)
Date: 21-06-2017
Nanodiamond induced high-Q resonances in defect-free photonic crystal slabs
Publisher: The Optical Society
Date: 24-10-2011
DOI: 10.1364/OE.19.022219
Quantum phase transitions of light
Publisher: Springer Science and Business Media LLC
Date: 26-11-2006
DOI: 10.1038/NPHYS466
Information Free Quantum Bus for Generating Stabiliser States
Publisher: Springer Science and Business Media LLC
Date: 08-2007
Robust charge-based qubit encoding
Publisher: American Physical Society (APS)
Date: 19-08-2005
Domain structures in quantum graphity
Publisher: American Physical Society (APS)
Date: 08-2012
Toward quantum information processing using EIT in diamond
Publisher: SPIE
Date: 09-02-2006
DOI: 10.1117/12.660189
Dark State Adiabatic Passage with Branched Networks and High-Spin Systems: Spin Separation and Entanglement
Publisher: Frontiers Media SA
Date: 15-09-2015
Low-loss tellurite fibers with embedded nanodiamonds
Publisher: OSA
Date: 2015
Two-Level Ultrabright Single Photon Emission from Diamond Nanocrystals
Publisher: American Chemical Society (ACS)
Date: 11-08-2009
DOI: 10.1021/NL9014167
Abstract: The fabrication of stable ultrabright single photon sources operating at room temperature is reported. The emitter is based on a color center within a diamond nanocrystal grown on a sapphire substrate by chemical vapor deposition method and exhibits a two-level electronic behavior with a maximum measured count rate of 3.2 x 10(6) counts/s at saturation. The emission is centered at approximately 756 nm with a full width at half-maximum approximately 11 nm and an excited state lifetime of 3.7 ns. These unique properties make it a leading candidate for quantum photonics and communication applications as well as for cellular biomarking.
Towards a picosecond transform-limited nitrogen-vacancy based single photon source
Publisher: The Optical Society
Date: 18-04-2008
DOI: 10.1364/OE.16.006240
Abstract: We analyze a nitrogen-vacancy (NV-) colour centre based single photon source based on cavity Purcell enhancement of the zero phonon line and suppression of other transitions. Optimal performance conditions of the cavity-centre system are analyzed using Master equation and quantum trajectory methods. By coupling the centre strongly to a high-finesse optical cavity [Q approximately O(10(4) - 10(5)), V approximately lambda (3)] and using sub-picosecond optical excitation the system has striking performance, including effective lifetime of 70 ps, linewidth of 0.01 nm, near unit single photon emission probability and small [O(10(-5))] multi-photon probability.
Coherent tunneling adiabatic passage with the alternating coupling scheme
Publisher: IOP Publishing
Date: 08-09-2009
DOI: 10.1088/0957-4484/20/40/405402
Abstract: The use of adiabatic passage techniques to mediate particle transport through real space, rather than phase space, is becoming an interesting possibility. We have investigated the properties of coherent tunneling adiabatic passage (CTAP) with alternating tunneling matrix elements. This coupling scheme, not previously considered in the donor in silicon paradigm, provides an interesting route to long-range quantum transport. We introduce simplified coupling protocols and transient eigenspectra as well as a realistic gate design for this transport protocol. Using a pairwise treatment of the tunnel couplings for a five-donor device with 30 nm donor spacings, 120 nm total chain length, we estimate the timescale required for adiabatic operation to be approximately 70 ns, a time well within the measured electron spin and estimated charge relaxation times for phosphorus donors in silicon.
Stark Shift Control of Single Optical Centers in Diamond
Publisher: American Physical Society (APS)
Date: 23-08-2006
Understanding Quantum Phase Transitions
Publisher: CRC Press
Date: 02-11-2010
DOI: 10.1201/B10273
Quantum gate forQ
Publisher: American Physical Society (APS)
Date: 26-01-2006
Fluorescent diamond microparticle doped glass fiber for magnetic field sensing
Publisher: AIP Publishing
Date: 08-2020
DOI: 10.1063/5.0013473
Abstract: Diamond containing the nitrogen-vacancy (NV) center is emerging as a significant sensing platform. However, most NV sensors require microscopes to collect the fluorescence signals and therefore are limited to laboratory settings. By embedding micron-scale diamond particles at an annular interface within the cross section of a silicate glass fiber, we demonstrate a robust fiber material capable of sensing magnetic fields. Luminescence spectroscopy and electron spin resonance characterization reveal that the optical properties of NV centers in the diamond microcrystals are well preserved throughout the fiber drawing process. The hybrid fiber presents a low propagation loss of ∼4.0 dB/m in the NV emission spectral window, permitting remote monitoring of the optically detected magnetic resonance signals. We demonstrate NV-spin magnetic resonance readout through 50 cm of fiber. This study paves a way for the scalable fabrication of fiber-based diamond sensors for field-deployable quantum metrology applications.
Quantum-information transport to multiple receivers
Publisher: American Physical Society (APS)
Date: 16-03-2006
Linearisation of RGB Camera Responses for Quantitative Image Analysis of Visible and UV Photography: A Comparison of Two Techniques
Publisher: Public Library of Science (PLoS)
Date: 18-11-2013
Einstein, von Frisch and the honeybee: a historical letter comes to light
Publisher: Springer Science and Business Media LLC
Date: 10-05-2021
DOI: 10.1007/S00359-021-01490-6
Abstract: The work of the Nobel Laureate Karl von Frisch , the founder of this journal, was seminal in many ways. He established the honeybee as a key animal model for experimental behavioural studies on sensory perception, learning and memory, and first correctly interpreted its famous dance communication. Here, we report on a previously unknown letter by the Physicist and Nobel Laureate Albert Einstein that was written in October 1949. It briefly addresses the work of von Frisch and also queries how understanding animal perception and navigation may lead to innovations in physics. We discuss records proving that Einstein and von Frisch met in April 1949 when von Frisch visited the USA to present a lecture on bees at Princeton University. In the historical context of Einstein’s theories and thought experiments, we discuss some more recent discoveries of animal sensory capabilities alien to us humans and potentially valuable for bio-inspired design improvements. We also address the orientation of animals like migratory birds mentioned by Einstein 70 years ago, which pushes the boundaries of our understanding nature, both its biology and physics.
Optical properties of neodymium ions in nanoscale regions of gallium nitride: erratum
Publisher: The Optical Society
Date: 25-01-2021
DOI: 10.1364/OME.420328
Critical components for diamond-based quantum coherent devices
Publisher: IOP Publishing
Date: 12-05-2006
Magnetic field-induced enhancement of the nitrogen-vacancy fluorescence quantum yield
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7NR02093G
Abstract: The nitrogen-vacancy (NV) centre in diamond is a remarkable optical defect with broad applications. We demonstrate that its fluorescence emission is enhanced at high magnetic fields with low excitation power.
Synthesis of discrete phase-coherent optical spectra from nonlinear ultrasound
Publisher: The Optical Society
Date: 23-03-2017
DOI: 10.1364/OE.25.007496
Diamond as a scaffold for bone growth.
Publisher: Springer Science and Business Media LLC
Date: 06-02-2013
DOI: 10.1007/S10856-013-4860-2
Abstract: Diamond is an attractive material for biomedical implants. In this work, we investigate its capacity as a bone scaffold. It is well established that the bioactivity of a material can be evaluated by examining its capacity to form apatite-like calcium phosphate phases on its surface when exposed to simulated body fluid. Accordingly, polycrystalline diamond (PCD) and ultrananocrystalline diamond (UNCD) deposited by microwave plasma chemical vapour deposition were exposed to simulated body fluid and assessed for apatite growth when compared to the bulk silicon. Scanning electron microscopy and X-ray photoelectron spectroscopy showed that both UNCD and PCD are capable of acting as a bone scaffold. The composition of deposited apatite suggests that UNCD and PCD are suitable for in vivo implantation with UNCD possible favoured in applications where rapid osseointegration is essential.
Laser threshold magnetometry
Publisher: IOP Publishing
Date: 08-01-2016
Transient nutation in a double resonance configuration: A dressed state description
Publisher: Elsevier BV
Date: 12-1995
Optical properties of single crystal diamond microfilms fabricated by ion implantation and lift-off processing
Publisher: Elsevier BV
Date: 2012
Diamond-based single-photon emitters
Publisher: IOP Publishing
Date: 14-06-2011
Optical Forces and Torques on Eccentric Nanoscale Core–Shell Particles
Publisher: American Chemical Society (ACS)
Date: 10-03-2021
Electrostatic-Aharonov-Bohm-like interferometry with adiabatic passage in quantum dots
Publisher: AIP
Date: 2011
DOI: 10.1063/1.3630166
Modelling single electron transfer in Si:P double quantum dots
Publisher: IOP Publishing
Date: 03-12-2004
Improved color constancy in honey bees enabled by parallel visual projections from dorsal ocelli
Publisher: Proceedings of the National Academy of Sciences
Date: 03-07-2017
Abstract: Color sensing requires a capacity to discount the changing color of natural light. We present a biologically validated mathematical solution to this classic problem based on honey bee color vision. The observed spectral tuning of two simple ocellar photoreceptors in the honey bee allows for an optimal color constancy solution to different light environments, including standard CIE (Commission Internationale de l’Eclairage) illuminations, natural forest light, sunlight, or shade. The model is fully supported by a neural pathway potentially allowing for the transfer of spectral information originating from the ocellar photoreceptors to the centralized information processing regions in the brain and explains previously observed behavioral results. This solution to color constancy can be implemented into color imaging systems to enable accurate color interpretation.
Single-Photon Emission and Quantum Characterization of Zinc Oxide Defects
Publisher: American Chemical Society (ACS)
Date: 24-01-2012
DOI: 10.1021/NL204010E
Abstract: Room temperature single-photon emission and quantum characterization is reported for isolated defects in zinc oxide. The defects are observed in thin films of both in-house synthesized and commercial zinc oxide nanoparticles. Emission spectra in the red and infrared, second-order photon correlation functions, lifetime measurements, and photon count rates are presented. Both two- and three-state emitters are identified. Sub-band gap absorption and red emission suggest these defects are the zinc vacancy. These results identify a new source of single photons in a readily available wide band gap semiconductor material which has exceptional electrical, optical, and biocompatibility properties.
Charge shelving and bias spectroscopy for the readout of a charge qubit on the basis of superposition states
Publisher: American Physical Society (APS)
Date: 07-2004
Photon-emitter dressed states in a closed waveguide
Publisher: American Physical Society (APS)
Date: 08-11-2021
Negative refraction of excitations in the Bose-Hubbard model
Publisher: American Physical Society (APS)
Date: 31-10-2014
Diamond photonics
Publisher: Springer Science and Business Media LLC
Date: 30-06-2011
En route to nanoscopic quantum optical imaging: counting emitters with photon-number-resolving detectors
Publisher: Optica Publishing Group
Date: 29-03-2022
DOI: 10.1364/OE.454412
Abstract: The fundamental understanding of biological pathways requires minimally invasive nanoscopic optical resolution imaging. Many approaches to high-resolution imaging rely on localization of single emitters, such as fluorescent molecules or quantum dots. Additionally, the exact determination of the number of such emitters in an imaging volume is essential for a number of applications however, in standard intensity-based microscopy it is not possible to determine the number of in idual emitters within a diffraction limited spot without initial knowledge of system parameters. Here we explore how quantum measurements of the emitted photons using photon number resolving detectors can be used to address this challenging task. In the proposed new approach, the problem of counting emitters reduces to the task of determining differences between the emitted photon distribution and the Poisson limit. We show that quantum measurements of the number of photons emitted from an ensemble of emitters enable the determination of both the number of emitters and the probability of emission. This method can be applied for any type of single-photon emitters. The scaling laws of this new approach are presented by the Cramer-Rao Lower Bounds, and this technique has great potential in quantum optical imaging with nanoscopic resolution.
Diamond integrated quantum photonics
Publisher: Elsevier BV
Date: 09-2008
A little diamond goes a long way
Publisher: Springer Science and Business Media LLC
Date: 04-2010
Quantum and classical chaos in kicked coupled Jaynes-Cummings cavities
Publisher: American Physical Society (APS)
Date: 28-06-2010
Photon extraction enhancement of praseodymium ions in gallium nitride nanopillars
Publisher: Springer Science and Business Media LLC
Date: 08-12-2022
DOI: 10.1038/S41598-022-25522-6
Abstract: Lanthanoid-doped Gallium Nitride (GaN) integrated into nanophotonic technologies is a promising candidate for room-temperature quantum photon sources for quantum technology applications. We manufactured praseodymium (Pr)-doped GaN nanopillars of varying size, and showed significantly enhanced room-temperature photon extraction efficiency compared to unstructured Pr-doped GaN. Implanted Pr ions in GaN show two main emission peaks at 650.3 nm and 651.8 nm which are attributed to 3 P 0 - 3 F 2 transition in the 4 f -shell. The maximum observed enhancement ratio was 23.5 for 200 nm diameter circular pillars, which can be ided into the emitted photon extraction enhancement by a factor of 4.5 and the photon collection enhancement by a factor of 5.2. The enhancement mechanism is explained by the eigenmode resonance inside the nanopillar. Our study provides a pathway for Lanthanoid-doped GaN nano/micro-scale photon emitters and quantum technology applications.
Fractional Quantum Hall Physics in Jaynes-Cummings-Hubbard Lattices
Publisher: American Physical Society (APS)
Date: 06-2012
Occupational pesticide exposure among Yemeni women
Publisher: Elsevier BV
Date: 04-2013
DOI: 10.1016/J.ENVRES.2012.12.002
Abstract: Limited research on the nature and extent of pesticide exposure among women in developing countries is available. The aim of this study was to describe potential pesticide exposure among women living in Yemen that occurs through agricultural work. In this cross-sectional study, 410 women who had a daughter enrolled in high school during 2011-2012 were surveyed regarding pesticide exposure. Of the 410 women who responded to the survey, 171 women reported working on farms during their lifetime. Of these 171 women, 147 reported working on a farm prior to marriage and 108 reported working on a farm after marriage. Among the women who reported working on a farm before marriage, 47% had worked on farms where pesticides were used. Among those women who reported working on farms after marriage, 69% of women worked on farms where pesticides were used. Among women who reported working on a farm before marriage where pesticides were used, 45% reported not using any protective equipment. This proportion was 33% among women who worked on a farm after marriage. Among the 28 commercial pesticides that were listed within the questionnaire, the banned compound dimethoate was the most commonly reported pesticide to be used on farms. The findings suggest that improving safe pesticide management practices among farmers and enforcing effective banning of the most toxic pesticides is needed to reduce pesticide exposure among Yemeni women.
Room-temperature coherent coupling of single spins in diamond
Publisher: Springer Science and Business Media LLC
Date: 28-05-2006
DOI: 10.1038/NPHYS318
Electrical readout of a spin qubit without double occupancy
Publisher: American Physical Society (APS)
Date: 23-03-2005
Slot-waveguide cavities for optical quantum information applications
Publisher: The Optical Society
Date: 17-04-2009
DOI: 10.1364/OE.17.007295
Abstract: To take existing quantum optical experiments and devices into a more practical regimes requires the construction of robust, solid-state implementations. In particular, to observe the strong-coupling regime of tom-photon interactions requires very small cavities and large quality factors. Here we show that the slot-waveguide geometry recently introduced for photonic applications is also promising for quantum optical applications in the visible regime. We study diamond- and GaP-based slot-waveguide cavities (SWCs) compatible with diamond colour centres e.g. nitrogen-vacancy (NV) defect. We show that one can achieve increased single-photon Rabi frequencies of order O(10(11)) rad s(-1) in ultra-small cavity modal volumes, nearly 2 orders of magnitude smaller than previously studied diamond-based photonic crystal cavities.
Facile One-Pot Synthesis of Nanodot-Decorated Gold–Silver Alloy Nanoboxes for Single-Particle Surface-Enhanced Raman Scattering Activity
Publisher: American Chemical Society (ACS)
Date: 31-08-2018
Abstract: Surface-enhanced Raman scattering (SERS) is an important, highly sensitive technique for chemical and biological analysis, which is critically dependent upon high-performance metallic substrates. Anisotropic gold (Au)-silver (Ag) alloy nanoboxes are attractive SERS substrates because of the greatly enhanced Raman signals from the strong electromagnetic fields on the sharp corners. Yet, the routine approach of Au-Ag alloy nanobox synthesis is still challenging because of the complicated procedures and use of biologically/environmentally unfriendly reagents. To facilitate the usage of Au-Ag alloy nanoboxes for broad SERS applications, we propose a facile green strategy to synthesize Au-Ag alloy nanoboxes with superior single-particle SERS sensitivity. Our novel straightforward strategy involves HAuCl
Coherent electron transport by adiabatic passage in an imperfect donor chain
Publisher: American Physical Society (APS)
Date: 18-10-2010
Maximizing the Hilbert space for a finite number of distinguishable quantum states
Publisher: American Physical Society (APS)
Date: 05-03-2004
Engineering the Interface: Nanodiamond Coating on 3D-Printed Titanium Promotes Mammalian Cell Growth and Inhibits Staphylococcus aureus Colonization
Publisher: American Chemical Society (ACS)
Date: 14-06-2019
Abstract: Additively manufactured selective laser melted titanium (SLM-Ti) opens the possibility of tailored medical implants for patients. Despite orthopedic implant advancements, significant problems remain with regard to suboptimal osseointegration at the interface between the implant and the surrounding tissue. Here, we show that applying a nanodiamond (ND) coating onto SLM-Ti scaffolds provides an improved surface for mammalian cell growth while inhibiting colonization of
Atomistic simulations of adiabatic coherent electron transport in triple donor systems
Publisher: American Physical Society (APS)
Date: 07-07-2009
High-speed quantum networking by ship
Publisher: Springer Science and Business Media LLC
Date: 02-11-2016
DOI: 10.1038/SREP36163
Abstract: Networked entanglement is an essential component for a plethora of quantum computation and communication protocols. Direct transmission of quantum signals over long distances is prevented by fibre attenuation and the no-cloning theorem, motivating the development of quantum repeaters, designed to purify entanglement, extending its range. Quantum repeaters have been demonstrated over short distances, but error-corrected, global repeater networks with high bandwidth require new technology. Here we show that error corrected quantum memories installed in cargo containers and carried by ship can provide a exible connection between local networks, enabling low-latency, high-fidelity quantum communication across global distances at higher bandwidths than previously proposed. With demonstrations of technology with sufficient fidelity to enable topological error-correction, implementation of the quantum memories is within reach, and bandwidth increases with improvements in fabrication. Our approach to quantum networking avoids technological restrictions of repeater deployment, providing an alternate path to a worldwide Quantum Internet.
Compensation of ac Stark and Zeeman shifts in Doppler-free nonlinear Faraday rotation in rubidium vapor
Publisher: IEEE
Date: 06-2007
Sensitive and Multiplexed SERS Nanotags for the Detection of Cytokines Secreted by Lymphoma
Publisher: American Chemical Society (ACS)
Date: 22-08-2019
DOI: 10.1021/ACSSENSORS.9B01211
Abstract: The sensitive and simultaneous detection of cytokines will provide new insights into the physiological process and disease pathways due to the complex nature of cytokine networks. However, the key challenge is the lack of probes that can simultaneously detect multiple cytokines in a single s le. In this contribution, we proposed an alternative approach for sensitive cytokine detection in a multiplex manner by the use of a new set of surface-enhanced Raman spectroscopy (SERS) nanotags. Typically, the newly designed SERS nanotags are composed of gold nanoparticles as the core, tuneable Raman molecules as the reporters, and a thin silver layer as the shell. As demonstrated through rigorous numerical simulations, enhanced Raman signal is achieved due to a strong localization of light in the 0.2 nm thin, optically deep-subwavelength region between the Au core and the Ag shell. Sensitive detection of cytokines is realized by forming a sandwich immunoassay. The detection limit is down to 4.5 pg mL
Donor activation and damage in Si-SiO2 from low-dose, low-energy ion implantation studied via electrical transport in MOSFETs
Publisher: IOP Publishing
Date: 03-2005
Nickel related optical centres in diamond created by ion implantation
Publisher: AIP Publishing
Date: 05-2010
DOI: 10.1063/1.3357374
Abstract: Ni-related optical centres in diamond are promising as alternatives to the nitrogen vacancy (NV) centre for quantum applications and biomarking. In order to achieve the reliability and reproducibility required, a method for producing the Ni-related centres in a controllable manner needs to be established. In this study, we have attempted this control by implanting high purity CVD diamond s les with Ni and N followed by thermal annealing. S les implanted with Ni show a new Ni-related PL peak centered at 711 nm and a well known doublet at 883/885 nm along with weak NV luminescence. The optical properties of the two Ni-related defects are investigated. In particular, an excited state lifetime of the 883/885 nm peak is measured to be 11.6 ns.
Spatial adiabatic passage as a quantum wire
Publisher: IEEE
Date: 02-2008
Adiabatic optical bus for long-range coupling between silicon photonic waveguides
Publisher: SPIE
Date: 05-2014
DOI: 10.1117/12.2050118
Phase transitions in photonic cavities: Exact vs. mean-field
Publisher: IEEE
Date: 02-2008
Cavity enhancement of a Nitrogen-Vacancy-based single photon source
Publisher: IEEE
Date: 02-2008
Coherent Tunneling Adiabatic Passage with the alternating coupling scheme
Publisher: IEEE
Date: 02-2008
Probing a doubly driven two-level atom
Publisher: IOP Publishing
Date: 1999
Guided magnonic Michelson interferometer
Publisher: Springer Science and Business Media LLC
Date: 30-01-2017
DOI: 10.1038/SREP41472
Abstract: Magnonics is an emerging field with potential applications in classical and quantum information processing. Freely propagating magnons in two-dimensional media are subject to dispersion, which limits their effective range and utility as information carriers. We show the design of a confining magnonic waveguide created by two surface current carrying wires placed above a spin-sheet, which can be used as a primitive for reconfigurable magnonic circuitry. We theoretically demonstrate the ability of such guides to counter the transverse dispersion of the magnon in a spin-sheet, thus extending the range of the magnon. A design of a magnonic directional coupler and controllable Michelson interferometer is shown, demonstrating its utility for information processing tasks.
Increased nitrogen-vacancy centre creation yield in diamond through electron beam irradiation at high temperature
Publisher: Elsevier BV
Date: 03-2019
Flower Colours through the Lens: Quantitative Measurement with Visible and Ultraviolet Digital Photography
Publisher: Public Library of Science (PLoS)
Date: 14-05-2014
Optical manipulation of single spins in diamond
Publisher: SPIE
Date: 08-02-2007
DOI: 10.1117/12.716391
Digital waveguide adiabatic passage part 2: experiment
Publisher: The Optical Society
Date: 02-2017
DOI: 10.1364/OE.25.002552
Optically induced spin-to-charge transduction in donor-spin readout
Publisher: American Physical Society (APS)
Date: 15-11-2005
High-performance diamond-based single-photon sources for quantum communication
Publisher: American Physical Society (APS)
Date: 09-11-2009
Interferometry using spatial adiabatic passage in quantum dot networks
Publisher: American Physical Society (APS)
Date: 08-01-2010
Time evolution of the one-dimensional Jaynes-Cummings-Hubbard Hamiltonian
Publisher: American Physical Society (APS)
Date: 30-10-2009
Diamond in Tellurite Glass: a New Medium for Quantum Information
Publisher: Wiley
Date: 20-04-2011
Magnetically sensitive nanodiamond-doped tellurite glass fibers
Publisher: Springer Science and Business Media LLC
Date: 19-01-2018
DOI: 10.1038/S41598-018-19400-3
Abstract: Traditional optical fibers are insensitive to magnetic fields, however many applications would benefit from fiber-based magnetometry devices. In this work, we demonstrate a magnetically sensitive optical fiber by doping nanodiamonds containing nitrogen vacancy centers into tellurite glass fibers. The fabrication process provides a robust and isolated sensing platform as the magnetic sensors are fixed in the tellurite glass matrix. Using optically detected magnetic resonance from the doped nanodiamonds, we demonstrate detection of local magnetic fields via side excitation and longitudinal collection. This is a first step towards intrinsically magneto-sensitive fiber devices with future applications in medical magneto-endoscopy and remote mineral exploration sensing.
Mechanism for the Amorphisation of Diamond
Publisher: Wiley
Date: 15-03-2012
Abstract: The breakdown of the diamond lattice is explored by ion implantation and molecular dynamics simulations. We show that lattice breakdown is strain-driven, rather than damage-driven, and that the lattice persists until 16% of the atoms have been removed from their lattice sites. The figure shows the transition between amorphous carbon and diamond, with the interfaces highlighted with dashed lines.
Numerical ordering of zero in honey bees
Publisher: American Association for the Advancement of Science (AAAS)
Date: 08-06-2018
Abstract: It has been said that the development of an understanding of zero by society initiated a major intellectual advance in humans, and we have been thought to be unique in this understanding. Although recent research has shown that some other vertebrates understand the concept of the “empty set,” Howard et al. now show that an understanding of this concept is present in untrained honey bees (see the Perspective by Nieder). This finding suggests that such an understanding has evolved independently in distantly related species that deal with complexity in their environments, and that it may be more widespread than previously appreciated. Science , this issue p. 1124 see also p. 1069
Highly uniform polycrystalline diamond coatings of three-dimensional structures
Publisher: Elsevier BV
Date: 02-2021
Enhanced single-photon emission in the near infrared from a diamond color center
Publisher: American Physical Society (APS)
Date: 15-06-2009
Very bright, near-infrared single photon emitters in diamond
Publisher: AIP Publishing
Date: 09-2013
DOI: 10.1063/1.4821630
Abstract: We demonstrate activation of bright diamond single photon emitters in the near infrared range by thermal annealing alone, i.e., without ion implantation. The activation is crucially dependent on the annealing ambient. The activation of the single photon emitters is only observed when the s le is annealed in forming gas (4% H2 in Ar) above temperatures of 1000 °C. By contrast, no emitters are activated by annealing in vacuum, oxygen, argon or deuterium. The emitters activated by annealing in forming gas exhibit very bright emission in the 730-760 nm wavelength range and have linewidths of ∼1.5-2.5 nm at room temperature.
Nanodiamonds in Fabry-Perot cavities: a route to scalable quantum computing
Publisher: IOP Publishing
Date: 28-01-2016
Buried picolitre fluidic channels in single-crystal diamond
Publisher: SPIE
Date: 20-12-2013
DOI: 10.1117/12.2035099
Amplification by stimulated emission of nitrogen-vacancy centres in a diamond-loaded fibre cavity
Publisher: Walter de Gruyter GmbH
Date: 28-09-2020
Abstract: Laser threshold magnetometry using the negatively charged nitrogen-vacancy (NV − ) centre in diamond as a gain medium has been proposed as a technique to dramatically enhance the sensitivity of room-temperature magnetometry. We experimentally explore a diamond-loaded open tunable fibre-cavity system as a potential contender for the realisation of lasing with NV − centres. We observe lification of the transmission of a cavity-resonant seed laser at 721 nm when the cavity is pumped at 532 nm and attribute this to stimulated emission. Changes in the intensity of spontaneously emitted photons accompany the lification, and a qualitative model including stimulated emission and ionisation dynamics of the NV − centre captures the dynamics in the experiment very well. These results highlight important considerations in the realisation of an NV − laser in diamond.
Flexible design of ultrahigh-Q microcavities in diamond-based photonic crystal slabs
Publisher: Optica Publishing Group
Date: 03-04-2009
DOI: 10.1364/OE.17.006465
Abstract: We design extremely flexible ultrahigh-Q diamond-based double-heterostructure photonic crystal slab cavities by modifying the refractive index of the diamond. The refractive index changes needed for ultrahigh-Q cavities with Q approximately 10(7), are well within what can be achieved (Delta n approximately 0.02). The cavity modes have relatively small volumes V<2 (lambda/n)(3), making them ideal for cavity quantum electro-dynamic applications. Importantly for realistic fabrication, our design is flexible because the range of parameters, cavity length and the index changes, that enables an ultrahigh-Q is quite broad. Furthermore as the index modification is post-processed, an efficient technique to generate cavities around defect centres is achievable, improving prospects for defect-tolerant quantum architectures.
Spectroscopy of a Cooper-pair box in the Autler-Townes configuration
Publisher: American Physical Society (APS)
Date: 20-09-2006
Numerical cognition in honeybees enables addition and subtraction
Publisher: American Association for the Advancement of Science (AAAS)
Date: 02-2019
Abstract: Honeybees learn to add or subtract one item from a set using color cues and can interpolate operations to a novel number.
Geometrogenesis under quantum graphity: Problems with the ripening universe
Publisher: American Physical Society (APS)
Date: 02-10-2015
Ion-Beam-Assisted Lift-Off Technique for Three-Dimensional Micromachining of Freestanding Single-Crystal Diamond
Publisher: Wiley
Date: 17-10-2005
Broadband and robust optical waveguide devices using coherent tunnelling adiabatic passage
Publisher: Optica Publishing Group
Date: 24-09-2012
DOI: 10.1364/OE.20.023108
Reconfigurable quantum metamaterials
Publisher: The Optical Society
Date: 23-05-2011
DOI: 10.1364/OE.19.011018
Strengths of dressed states transitions
Publisher: IOP Publishing
Date: 1999
Chromium single-photon emitters in diamond fabricated by ion implantation
Publisher: American Physical Society (APS)
Date: 15-03-2010
Quantum-dot cellular automata using buried dopants
Publisher: American Physical Society (APS)
Date: 07-03-2005
Top-down pathways to devices with few and single atoms placed to high precision
Publisher: IOP Publishing
Date: 28-06-2010
Pulse shaping by coupled cavities: Single photons and qudits
Publisher: American Physical Society (APS)
Date: 09-09-2009
Diamond for Quantum Computing
Publisher: American Association for the Advancement of Science (AAAS)
Date: 20-06-2008
Diamond and Silicon Get Entangled
Publisher: American Physical Society (APS)
Date: 11-09-2014
DOI: 10.1103/PHYSICS.7.93
Coupling slot-waveguide cavities for large-scale quantum optical devices
Publisher: The Optical Society
Date: 21-03-2011
DOI: 10.1364/OE.19.006354
Direct measurement and modelling of internal strains in ion-implanted diamond
Publisher: IOP Publishing
Date: 30-08-2013
DOI: 10.1088/0953-8984/25/38/385403
Abstract: We present a phenomenological model and finite element simulations to describe the depth variation of mass density and strain of ion-implanted single-crystal diamond. Several experiments are employed to validate the approach: firstly, s les implanted with 180 keV B ions at relatively low fluences are characterized using high-resolution x-ray diffraction secondly, the mass density variation of a s le implanted with 500 keV He ions, well above its amorphization threshold, is characterized with electron energy loss spectroscopy. At high damage densities, the experimental depth profiles of strain and density display a saturation effect with increasing damage and a shift of the damage density peak towards greater depth values with respect to those predicted by TRIM simulations, which are well accounted for in the model presented here. The model is then further validated by comparing transmission electron microscopy-measured and simulated thickness values of a buried amorphous carbon layer formed at different depths by implantation of 500 keV He ions through a variable-thickness mask to simulate the simultaneous implantation of ions at different energies.
Observation of transient gain without population inversion in a laser-cooled rubidiumΛ
Publisher: American Physical Society (APS)
Date: 10-10-2001
Producing optimized ensembles of nitrogen-vacancy color centers for quantum information applications
Publisher: AIP Publishing
Date: 15-12-2009
DOI: 10.1063/1.3271579
Abstract: Quantum information applications place stringent demands on the development of platforms that can host them. Color centers in diamond have been identified as important media for quantum information processing. Accordingly, the photoluminescence properties of nitrogen-vacancy (N-V) centers in diamond created by implantation and annealing are studied at cryogenic temperatures (below 10 K). We examine high pressure high temperature and chemical vapor deposition synthetic diamonds with varying nitrogen concentration and present an accurate method to estimate the concentration of the (N-V) centers created by ion implantation. The ion irradiation route produced up to 6 ppm of optically active (N-V) centers, while nitrogen implantation yielded up to 3 ppm of optically active (N-V) with 8% conversion efficiency. However, a broadening of the (N-V)− zero phonon line was observed in all s les.
Fabrication of single optical centres in diamond—a review
Publisher: Elsevier BV
Date: 09-2010
Surface-gate-defined single-electron transistor in a MoS2 bilayer
Publisher: IOP Publishing
Date: 21-02-2017
Abstract: We report the multi-scale modeling and design of a gate-defined single-electron transistor in a MoS
Fast donor-based electron spin quantum computing
Publisher: SPIE
Date: 23-02-2005
DOI: 10.1117/12.583200
Photoluminescence properties of praseodymium ions implanted into submicron regions in gallium nitride
Publisher: IOP Publishing
Date: 25-04-2019
Development of a templated approach to fabricate diamond patterns on various substrates
Publisher: American Chemical Society (ACS)
Date: 30-05-2014
DOI: 10.1021/AM5016556
Abstract: We demonstrate a robust templated approach to pattern thin films of chemical vapor deposited nanocrystalline diamond grown from monodispersed nanodiamond (mdND) seeds. The method works on a range of substrates, and we herein demonstrate the method using silicon, aluminum nitride (AlN), and sapphire substrates. Patterns are defined using photo- and e-beam lithography, which are seeded with mdND colloids and subsequently introduced into microwave assisted chemical vapor deposition reactor to grow patterned nanocrystalline diamond films. In this study, we investigate various factors that affect the selective seeding of different substrates to create high quality diamond thin films, including mdND surface termination, zeta potential, surface treatment, and plasma cleaning. Although the electrostatic interaction between mdND colloids and substrates is the main process driving adherence, we found that chemical reaction (esterification) or hydrogen bonding can potentially dominate the seeding process. Leveraging the knowledge on these different interactions, we optimize fabrication protocols to eliminate unwanted diamond nucleation outside the patterned areas. Furthermore, we have achieved the deposition of patterned diamond films and arrays over a range of feature sizes. This study contributes to a comprehensive understanding of the mdND-substrate interaction that will enable the fabrication of integrated nanocrystalline diamond thin films for microelectronics, sensors, and tissue culturing applications.
A study of size-dependent properties of MoS2 monolayer nanoflakes using density-functional theory
Publisher: Springer Science and Business Media LLC
Date: 29-08-2017
DOI: 10.1038/S41598-017-09305-Y
Abstract: Novel physical phenomena emerge in ultra-small sized nanomaterials. We study the limiting small-size-dependent properties of MoS 2 monolayer rhombic nanoflakes using density-functional theory on structures of size up to Mo 35 S 70 (1.74 nm). We investigate the structural and electronic properties as functions of the lateral size of the nanoflakes, finding zigzag is the most stable edge configuration, and that increasing size is accompanied by greater stability. We also investigate passivation of the structures to explore realistic settings, finding increased HOMO-LUMO gaps and energetic stability. Understanding the size-dependent properties will inform efforts to engineer electronic structures at the nano-scale.
Characterization of three-dimensional microstructures in single-crystal diamond
Publisher: Elsevier BV
Date: 10-2006
Correction to: Einstein, von Frisch and the honeybee: a historical letter comes to light
Publisher: Springer Science and Business Media LLC
Date: 21-06-2021
DOI: 10.1007/S00359-021-01497-Z
Abstract: A correction to this paper has been published: 0.1007/s00359-021-01497-z.
Global control and fast solid-state donor electron spin quantum computing
Publisher: American Physical Society (APS)
Date: 22-07-2005
Qubit Transport and Fault-tolerant Architectures in Silicon
Publisher: IEEE
Date: 07-2006
Progress in silicon-based quantum computing
Publisher: The Royal Society
Date: 15-07-2003
Abstract: We review progress at the Australian Centre for Quantum Computer Technology towards the fabrication and demonstration of spin qubits and charge qubits based on phosphorus donor atoms embedded in intrinsic silicon. Fabrication is being pursued via two complementary pathways: a 'top-down' approach for near-term production of few-qubit demonstration devices and a 'bottom-up' approach for large-scale qubit arrays with sub-nanometre precision. The 'top-down' approach employs a low-energy (keV) ion beam to implant the phosphorus atoms. Single-atom control during implantation is achieved by monitoring on-chip detector electrodes, integrated within the device structure. In contrast, the 'bottom-up' approach uses scanning tunnelling microscope lithography and epitaxial silicon overgrowth to construct devices at an atomic scale. In both cases, surface electrodes control the qubit using voltage pulses, and dual single-electron transistors operating near the quantum limit provide fast read-out with spurious-signal rejection.
The effect of gallium implantation on the optical properties of diamond
Publisher: Elsevier BV
Date: 05-2013
Fabrication of Ultrathin Single‐Crystal Diamond Membranes
Publisher: Wiley
Date: 16-12-2008
Single atom-scale diamond defect allows a large Aharonov-Casher phase
Publisher: American Physical Society (APS)
Date: 21-10-2009
Digital three-state adiabatic passage
Publisher: American Physical Society (APS)
Date: 13-06-2013
Spatial adiabatic passage in a realistic triple well structure
Publisher: American Physical Society (APS)
Date: 13-06-2008
Coalitions in the quantum Minority game: Classical cheats and quantum bullies
Publisher: Elsevier BV
Date: 02-2007
Depletion of nitrogen-vacancy color centers in diamond via hydrogen passivation
Publisher: AIP Publishing
Date: 13-02-2012
DOI: 10.1063/1.3684612
Abstract: We show reduction in the emission from nitrogen-vacancy (NV) centers in single crystal diamond due to exposure to hydrogen plasmas ranging from 700 °C to 1000 °C. Significant fluorescence reduction was observed beneath the exposed surface to 80 μm depth after ∼10 min and did not recover after post-annealing in vacuum for 7 h at 1100 °C. We attribute the fluorescence reduction to the formation of nitrogen-vacancy-hydrogen centers by the plasma-induced diffusion of hydrogen. These results have important implications for the formation of NV centers for quantum applications, whilst also providing experimental evidence of long range hydrogen diffusion through intrinsic high-purity diamond.
Photochromism in single nitrogen-vacancy defect in diamond
Publisher: Springer Science and Business Media LLC
Date: 30-11-2005
Coherent population trapping in diamond N-V centers at zero magnetic field
Publisher: IEEE
Date: 2006
Transformation optics for cavity array metamaterials
Publisher: The Optical Society
Date: 27-02-2013
DOI: 10.1364/OE.21.005575
Multiplexing single electron transistors for application in scalable solid-state quantum computing
Publisher: AIP Publishing
Date: 22-01-2007
DOI: 10.1063/1.2435335
Abstract: Single electron transistors (SETs) are nanoscale electrometers of unprecedented sensitivity, and as such have been proposed as readout devices in a number of quantum computer architectures. The authors show that the functionality of a standard SET can be multiplexed so as to operate as both readout device and control gate for solid-state qubit systems based on charge localization and spin-charge transduction. Such multiplexing offers new possibilities for gate density reduction in nanoscale devices, and may therefore play a role in scalable quantum computer architectures.
Resonant and off-resonant transients in electromagnetically induced transparency: Turn-on and turn-off dynamics
Publisher: American Physical Society (APS)
Date: 15-04-2002
Digital waveguide adiabatic passage part 1: Theory
Publisher: The Optical Society
Date: 03-2017
DOI: 10.1364/OE.25.005466
An upper limit on the lateral vacancy diffusion length in diamond
Publisher: Elsevier BV
Date: 04-2012
Lossless intensity-dependent dispersion in coherently prepared multi-state atom using EIT
Publisher: IEEE
Date: 2003
Perspective: Biomedical sensing and imaging with optical fibers - Innovation through convergence of science disciplines
Publisher: AIP Publishing
Date: 10-09-2018
DOI: 10.1063/1.5040861
Abstract: The probing of physiological processes in living organisms is a grand challenge that requires bespoke analytical tools. Optical fiber probes offer a minimally invasive approach to report physiological signals from specific locations inside the body. This perspective article discusses a wide range of such fiber probes developed at the Australian Research Council Centre of Excellence for Nanoscale BioPhotonics. Our fiber platforms use a range of sensing modalities, including embedded nanodiamonds for magnetometry, interferometric fiber cavities for refractive index sensing, and tailored metal coatings for surface plasmon resonance sensing. Other fiber probes exploit molecularly sensitive Raman scattering or fluorescence where optical fibers have been combined with chemical and immunosensors. Fiber imaging probes based on interferometry and computational imaging are also discussed as emerging in vivo diagnostic devices. We provide ex les to illustrate how the convergence of multiple scientific disciplines generates opportunities for the fiber probes to address key challenges in real-time in vivo diagnostics. These future fiber probes will enable the asking and answering of scientific questions that were never possible before.
Diamond-based structures to collect and guide light
Publisher: IOP Publishing
Date: 21-02-2011
Ultrahigh-Q microcavities in diamond-based photonic crystal slabs
Publisher: IEEE
Date: 06-2009
Fluorescent Nanodiamonds Embedded in Poly-ε-Caprolactone Fibers as Biomedical Scaffolds
Publisher: American Chemical Society (ACS)
Date: 05-11-2020
Controlled phase gate for solid-state charge-qubit architectures
Publisher: American Physical Society (APS)
Date: 18-01-2005
Coupling light and sound
Publisher: Walter de Gruyter GmbH
Date: 25-01-2019
Abstract: Nonlinear optical processes are vital for fields including telecommunications, signal processing, data storage, spectroscopy, sensing and imaging. As an independent research area, nonlinear optics began with the invention of the laser, because practical sources of intense light needed to generate optical nonlinearities were not previously available. However, the high power requirements of many nonlinear optical systems limit their use, especially in portable or medical applications, and so there is a push to develop new materials and resonant structures capable of producing nonlinear optical phenomena with low-power light emitted by inexpensive and compact sources. Acoustic nonlinearities, especially giant acoustic nonlinear phenomena in gas bubbles and liquid droplets, are much stronger than their optical counterparts. Here, we suggest employing acoustic nonlinearities to generate new optical frequencies, thereby effectively reproducing nonlinear optical processes without the need for laser light. We critically survey the current literature dedicated to the interaction of light with nonlinear acoustic waves and highly nonlinear oscillations of gas bubbles and liquid droplets. We show that the conversion of acoustic nonlinearities into optical signals is possible with low-cost incoherent light sources such as light-emitting diodes, which would usher new classes of low-power photonic devices that are more affordable for remote communities and developing nations, or where there are demanding requirements on size, weight and power.
Visitors' wayfinding strategies and navigational aids in unfamiliar urban environment
Publisher: Informa UK Limited
Date: 12-2019
Coherent population trapping in diamond N-V centers at zero magnetic field
Publisher: The Optical Society
Date: 2006
DOI: 10.1364/OE.14.007986
Abstract: Coherent population trapping at zero magnetic field was observed for nitrogen-vacancy centers in diamond under optical excitation. This was measured as a reduction in photoluminescence when the detuning between two excitation lasers matched the 2.88 GHz crystal-field splitting of the color center ground states. This behavior is highly sensitive to strain, which modifies the excited states, and was unexpected following recent experiments demonstrating optical readout of single nitrogen-vacancy electron spins based on cycling transitions. These results demonstrate for the first time that three-level Lambda configurations suitable for proposed quantum information applications can be realized simultaneously for all four orientations of nitrogen-vacancy centers at zero magnetic field.
Measuring decoherence properties of charge qubits using buried donor cellular automata
Publisher: SPIE
Date: 23-02-2005
DOI: 10.1117/12.583194
Scaling of coherent tunneling adiabatic passage in solid-state coherent quantum systems.
Publisher: SPIE
Date: 23-02-2005
DOI: 10.1117/12.583193
Single-spin detection and read-out for the solid-state quantum computer via resonant techniques
Publisher: SPIE
Date: 23-02-2005
DOI: 10.1117/12.583196
Quantum multilateration: Subdiffraction emitter pair localization via three spatially separate Hanbury Brown and Twiss measurements
Publisher: American Physical Society (APS)
Date: 10-01-2020
Spatial coherent transport of interacting dilute Bose gases
Publisher: American Physical Society (APS)
Date: 04-06-2008
Analysis and Geometric Optimization of Single Electron Transistors for Read-Out in Solid-State Quantum Computing
Publisher: American Scientific Publishers
Date: 06-2005
Microscopy as a statistical, Rényi-Ulam, half-lie game: a new heuristic search strategy to accelerate imaging
Publisher: Springer Science and Business Media LLC
Date: 07-11-2017
DOI: 10.1038/S41598-017-14876-X
Abstract: Finding a fluorescent target in a biological environment is a common and pressing microscopy problem. This task is formally analogous to the canonical search problem. In ideal (noise-free, truthful) search problems, the well-known binary search is optimal. The case of half-lies, where one of two responses to a search query may be deceptive, introduces a richer, Rényi-Ulam problem and is particularly relevant to practical microscopy. We analyse microscopy in the contexts of Rényi-Ulam games and half-lies, developing a new family of heuristics. We show the cost of insisting on verification by positive result in search algorithms for the zero-half-lie case bisectioning with verification incurs a 50% penalty in the average number of queries required. The optimal partitioning of search spaces directly following verification in the presence of random half-lies is determined. Trisectioning with verification is shown to be the most efficient heuristic of the family in a majority of cases.
Adiabatic two-photon quantum gate operations using a long-range photonic bus
Publisher: IOP Publishing
Date: 04-02-2015
Optimizing single-electron transistors as electrometers for high-precision electrometry of charge on quantum dots
Publisher: SPIE
Date: 23-02-2005
DOI: 10.1117/12.583199
Photophysics of chromium-related diamond single-photon emitters
Publisher: American Physical Society (APS)
Date: 13-04-2010
Dipole emitters in fiber: Interface effects, collection efficiency and optimization
Publisher: The Optical Society
Date: 09-08-2011
DOI: 10.1364/OE.19.016182
RIOT: Recursive Inertial Odometry Transformer for Localisation from Low-Cost IMU Measurements
Publisher: MDPI AG
Date: 17-03-2023
DOI: 10.3390/S23063217
Abstract: Inertial localisation is an important technique as it enables ego-motion estimation in conditions where external observers are unavailable. However, low-cost inertial sensors are inherently corrupted by bias and noise, which lead to unbound errors, making straight integration for position intractable. Traditional mathematical approaches are reliant on prior system knowledge, geometric theories and are constrained by predefined dynamics. Recent advances in deep learning, which benefit from ever-increasing volumes of data and computational power, allow for data-driven solutions that offer more comprehensive understanding. Existing deep inertial odometry solutions rely on estimating the latent states, such as velocity, or are dependent on fixed-sensor positions and periodic motion patterns. In this work, we propose taking the traditional state estimation recursive methodology and applying it in the deep learning domain. Our approach, which incorporates the true position priors in the training process, is trained on inertial measurements and ground truth displacement data, allowing recursion and learning both motion characteristics and systemic error bias and drift. We present two end-to-end frameworks for pose invariant deep inertial odometry that utilises self-attention to capture both spatial features and long-range dependencies in inertial data. We evaluate our approaches against a custom 2-layer Gated Recurrent Unit, trained in the same manner on the same data, and tested each approach on a number of different users, devices and activities. Each network had a sequence length weighted relative trajectory error mean ≤0.4594 m, highlighting the effectiveness of our learning process used in the development of the models.
Coherent tunneling via adiabatic passage in a three-well Bose-Hubbard system
Publisher: American Physical Society (APS)
Date: 09-05-2012
Diamond‐Based Optical Waveguides, Cavities, and Other Microstructures
Publisher: Wiley
Date: 28-03-2013
MicroRNA alterations and associated aberrant DNA methylation patterns across multiple sample types in oral squamous cell carcinoma
Publisher: Public Library of Science (PLoS)
Date: 22-11-2011
Near‐Infrared Fluorescence from Silicon‐ and Nickel‐Based Color Centers in High‐Pressure High‐Temperature Diamond Micro‐ and Nanoparticles
Publisher: Wiley
Date: 10-2020
Preferential coupling of diamond NV centres in step-index fibres
Publisher: Optica Publishing Group
Date: 28-04-2021
DOI: 10.1364/OE.417825
Abstract: Diamonds containing the negatively charged nitrogen-vacancy centre are a promising system for room-temperature magnetometry. The combination of nano- and micro-diamond particles with optical fibres provides an option for deploying nitrogen-vacancy magnetometers in harsh and challenging environments. Here we numerically explore the coupling efficiency from nitrogen-vacancy centres within a diamond doped at the core/clad interface across a range of commercially available fibre types so as to inform the design process for a diamond in fibre magnetometers. We determine coupling efficiencies from nitrogen-vacancy centres to the guided modes of a step-index fibre and predict the optically detected magnetic resonance (ODMR) generated by a ensemble of four nitrogen-vacancy centres in this hybrid fibre system. Our results show that the coupling efficiency is enhanced with a high refractive index difference between the fibre core and cladding and depends on the radial position of the nitrogen-vacancy centres in the fibre core. Our ODMR simulations show that due to the preferential coupling of the nitrogen-vacancy emission to the fibre guided modes, certain magnetometry features such as ODMR contrast can be enhanced and lead to improved sensitivity in such diamond-fibre systems, relative to conventional diamond only ensemble geometries.
21^st-Century Applications of Nanodiamonds
Publisher: The Optical Society
Date: 09-2010
Plasmonic nanoantenna hydrophones
Publisher: Springer Science and Business Media LLC
Date: 09-09-2016
DOI: 10.1038/SREP32892
Abstract: Ultrasound is a valuable biomedical imaging modality and diagnostic tool. Here we theoretically demonstrate that a single dipole plasmonic nanoantenna can be used as an optical hydrophone for MHz-range ultrasound. The nanoantenna is tuned to operate on a high-order plasmon mode, which provides an increased sensitivity to ultrasound in contrast to the usual approach of using the fundamental dipolar plasmon resonance. Plasmonic nanoantenna hydrophones may be useful for ultrasonic imaging of biological cells, cancer tissues or small blood vessels, as well as for Brillouin spectroscopy at the nanoscale.
Deterministic optical quantum computer using photonic modules
Publisher: American Physical Society (APS)
Date: 17-09-2008
Towards hybrid diamond optical devices
Publisher: IEEE
Date: 06-2011
Bright and photostable nitrogen-vacancy fluorescence from unprocessed detonation nanodiamond
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6NR07834F
Abstract: Bright and photostable fluorescence from nitrogen-vacancy (NV) centers is demonstrated in unprocessed detonation nanodiamond particle aggregates. The optical properties of these particles is analyzed using confocal fluorescence microscopy and spectroscopy, time resolved fluorescence decay measurements, and optically detected magnetic resonance experiments. Two particle populations with distinct optical properties are identified and compared to high-pressure high-temperature (HPHT) fluorescent nanodiamonds. We find that the brightness of one detonation nanodiamond particle population is on the same order as that of highly processed fluorescent 100 nm HPHT nanodiamonds. Our results may open the path to a simple and up-scalable route for the production of fluorescent NV nanodiamonds for use in bioimaging applications.
Breaking time reversal symmetry with light
Publisher: American Physical Society (APS)
Date: 11-10-2010
DOI: 10.1103/PHYSICS.3.85
Optical properties of neodymium ions in nanoscale regions of gallium nitride
Publisher: Optica Publishing Group
Date: 18-09-2020
DOI: 10.1364/OME.401765
Abstract: Wide bandgap semiconductors are increasingly important for bioimaging applications, as they can possess good biocompatibility and host a large range of fluorescent defects spanning the visible to infrared. Gallium nitride is one promising host for photostable fluorophores. In particular, neodymium (Nd)-doped gallium nitride (GaN) shows bright near-infrared fluorescence and narrow room temperature linewidth and is therefore a candidate material for fluorescent probes for bioimaging. To explore the conditions necessary to generate biomarkers based on Nd:GaN, this paper reports the room temperature photoluminescence (PL) properties of small ensembles of Nd ions implanted into the nanoscale regions of GaN epilayers. The minimum volume of Nd-implanted GaN that can be optically detected in this study is about 8×10 4 nm 3 and the minimum detected ensemble of Nd ions is about 4×10 3 , although not all of implanted Nd ions activate as luminescence centers. We show from the PL excitation spectra that the strongest resonant excitation appears at 619 nm, attributed to the 4 I 9/2 → 4 G 5/2 ( 4 G 7/2 ) transition in the 4 f -shell. We measure the luminescence lifetime to be several tens of microseconds. We also identify the presence of a different excitation mechanism from the resonant excitation when excited below 510 nm (above 2.43 eV).
Interferometry using adiabatic passage in dilute-gas Bose-Einstein condensates
Publisher: American Physical Society (APS)
Date: 05-12-2012
Magnetic-field-dependent stimulated emission from nitrogen-vacancy centers in diamond
Publisher: American Association for the Advancement of Science (AAAS)
Date: 03-06-2022
Abstract: Negatively charged nitrogen-vacancy (NV) centers in diamond are promising magnetic field quantum sensors. Laser threshold magnetometry theory predicts improved NV center ensemble sensitivity via increased signal strength and magnetic field contrast. Here, we experimentally demonstrate laser threshold magnetometry. We use a macroscopic high-finesse laser cavity containing a highly NV-doped and low absorbing diamond gain medium that is pumped at 532 nm and resonantly seeded at 710 nm. This enables a 64% signal power lification by stimulated emission. We test the magnetic field dependency of the lification and thus demonstrate magnetic field–dependent stimulated emission from an NV center ensemble. This emission shows an ultrahigh contrast of 33% and a maximum output power in the milliwatt regime. The coherent readout of NV centers pave the way for novel cavity and laser applications of quantum defects and diamond NV magnetic field sensors with substantially improved sensitivity for the health, research, and mining sectors.
Constructive control of quantum systems using factorization of unitary operators
Publisher: IOP Publishing
Date: 17-09-2002
High-speed quantum gates with cavity quantum electrodynamics
Publisher: American Physical Society (APS)
Date: 23-12-2008
Recent progress in diamond photonics
Publisher: IEEE
Date: 07-2012
A highly efficient two level diamond based single photon source
Publisher: AIP Publishing
Date: 18-05-2009
DOI: 10.1063/1.3141450
Abstract: An unexplored diamond defect center that is found to emit stable single photons at a measured rate of 1.6 MHz at room temperature is reported. The center, identified in chemical vapor deposition grown diamond crystals, exhibits a sharp zero phonon line at 734 nm with a full width at half maximum of ∼4 nm. The photon statistics confirm that the center is a single emitter and provides direct evidence of a true two level single quantum system in diamond.
Dark-state adiabatic passage with spin-one particles
Publisher: American Physical Society (APS)
Date: 14-07-2014
Electrostatically defined serial triple quantum dot charged with few electrons
Publisher: American Physical Society (APS)
Date: 03-08-2007
Diamond chemical-vapor deposition on optical fibers for fluorescence waveguiding
Publisher: AIP Publishing
Date: 21-03-2005
DOI: 10.1063/1.1890484
Abstract: A technique has been developed for depositing diamond crystals on the endfaces of optical fibers and capturing the fluorescence generated by optically active defects in diamond into the fiber. This letter details the diamond growth on optical fibers and transmission of fluorescence through the fiber from the nitrogen-vacancy color center in diamond. Control of the concentration of defects incorporated during the chemical vapor deposition growth process is also demonstrated. These are critical steps in developing a fiber coupled single-photon source based on optically active defect centers in diamond.
Polycrystalline Diamond Coating of Additively Manufactured Titanium for Biomedical Applications
Publisher: American Chemical Society (ACS)
Date: 22-02-2018
Abstract: Additive manufacturing using selective laser melted titanium (SLM-Ti) is used to create bespoke items across many erse fields such as medicine, defense, and aerospace. Despite great progress in orthopedic implant applications, such as for "just in time" implants, significant challenges remain with regards to material osseointegration and the susceptibility to bacterial colonization on the implant. Here, we show that polycrystalline diamond coatings on these titanium s les can enhance biological scaffold interaction improving medical implant applicability. The highly conformable coating exhibited excellent bonding to the substrate. Relative to uncoated SLM-Ti, the diamond coated s les showed enhanced mammalian cell growth, enriched apatite deposition, and reduced microbial S. aureus activity. These results open new opportunities for novel coatings on SLM-Ti devices in general and especially show promise for improved biomedical implants.
Single photon emission from nanodiamond in tellurite glass
Publisher: IEEE
Date: 08-2011
Fifty years of Jaynes–Cummings physics
Publisher: IOP Publishing
Date: 11-2013
Self-formed cavity quantum electrodynamics in coupled dipole cylindrical-waveguide systems
Publisher: The Optical Society
Date: 02-05-2014
DOI: 10.1364/OE.22.011301
Two field nonlinear Faraday rotation in rubidium vapor in a Doppler-free geometry
Publisher: Elsevier BV
Date: 08-2007
Long-range coupling of silicon photonic waveguides using lateral leakage and adiabatic passage
Publisher: The Optical Society
Date: 19-09-2013
DOI: 10.1364/OE.21.022705
Prospects for photon blockade in four-level systems in the N configuration with more than one atom
Publisher: IOP Publishing
Date: 24-05-2000
Absorptive laser threshold magnetometry: combining visible diamond Raman lasers and nitrogen-vacancy centres
Publisher: IOP Publishing
Date: 06-2021
Abstract: We propose a high-sensitivity magnetometry scheme based on a diamond Raman laser with visible pump absorption by an ensemble of coherently microwave driven negatively charged nitrogen-vacancy centres (NV − ) in the same diamond crystal. The NV − centres’ absorption and emission are spin-dependent. We show how the varying absorption of the NV − centres changes the Raman laser output. A shift in the diamond Raman laser threshold and output occurs with the external magnetic field and microwave driving. We develop a theoretical framework with steady-state solutions to describe the effects of coherently driven NV − centres including the charge state switching between NV − and its neutral charge state NV 0 in a diamond Raman laser. We discuss that such a laser working at the threshold can be employed for magnetic field sensing. In contrast to previous studies on NV − magnetometry with visible laser absorption, the laser threshold magnetometry method is expected to have low technical noise, due to low background light in the measurement signal. For magnetic-field sensing, we project a shot-noise limited DC sensitivity of a few pT / H z in a well-calibrated cavity with realistic parameters. This sensor employs the broad visible absorption of NV − centres and unlike previous laser threshold magnetometry proposals it does not rely on active NV − centre lasing or an infrared laser medium at the specific wavelength of the NV − centre’s infrared absorption line.
Tailoring the optical constants of diamond by ion implantation
Publisher: The Optical Society
Date: 17-04-2012
DOI: 10.1364/OME.2.000644
Near-Surface Spectrally Stable Nitrogen Vacancy Centres Engineered in Single Crystal Diamond
Publisher: Wiley
Date: 25-05-2012
Abstract: A method for engineering thin (<100 nm) layers of homoepitaxial diamond containing high quality, spectrally stable, isolated nitrogen-vacancy (NV) centres is reported. The photoluminescence excitation linewidth of the engineered NVs are as low as 140 MHz, at temperatures below 12 K, while the spin properties are at a level suitable for quantum memory and spin register applications. This methodology of NV fabrication is an important step toward scalable and practical diamond based photonic devices suitable for quantum information processing.
Single photon quantum non-demolition measurements in the presence of inhomogeneous broadening
Publisher: IOP Publishing
Date: 09-2009
Accessing diamond waveguides and future applications
Publisher: SPIE
Date: 11-02-2010
DOI: 10.1117/12.843013
Engineering of nitrogen-vacancy color centers in high purity diamond by ion implantation and annealing
Publisher: AIP Publishing
Date: 15-04-2011
DOI: 10.1063/1.3573768
Abstract: The negatively-charged nitrogen-vacancy (NV) center is the most studied optical center in diamond and is very important for applications in quantum information science. Many proposals for integrating NV centers in quantum and sensing applications rely on their tailored fabrication in ultra pure host material. In this study, we use ion implantation to controllably introduce nitrogen into high purity, low nitrogen chemical vapor deposition diamond s les. The properties of the resulting NV centers are studied as a function of implantation temperature, annealing temperature, and implantation fluence. We compare the implanted NV centers with native NV centers present deep in the bulk of the as-grown s les. The results for implanted NV centers are promising but indicate, at this stage, that the deep native NV centers possess overall superior optical properties. In particular, the implanted NV centers obtained after annealing at 2000 °C under a stabilizing pressure of 8 GPa showed an ensemble linewidth of 0.17 nm compared to 0.61 nm after annealing at 1000 °C. Over the same temperature range, the ensemble NV−/NV0 ratio increased by a factor of ∼5, although this was accompanied by an overall decrease in the NV count.
Band structure and giant Stark effect in two-dimensional transition-metal dichalcogenides
Publisher: IOP Publishing
Date: 20-11-2018
Observations of a doubly driven V system probed to a fourth level in laser-cooled rubidium
Publisher: American Physical Society (APS)
Date: 11-06-2001
Perfect state transfer and maximal entanglement in a trimer of three-level systems
Publisher: American Physical Society (APS)
Date: 25-09-2023
3D-Printed Diamond–Titanium Composite: A Hybrid Material for Implant Engineering
Publisher: American Chemical Society (ACS)
Date: 24-12-2019
Abstract: Diamond-based implant materials make up an emerging research area where the materials could be prepared to promote cellular functions, decrease bacteria attachment, and be suitable for potential
Microwave quantum optics as a direct probe of the Overhauser field in a quantum dot circuit quantum electrodynamics device
Publisher: American Physical Society (APS)
Date: 07-01-2021
Nanodiamond in tellurite glass Part II: Practical nanodiamond-doped fibers
Publisher: The Optical Society
Date: 09-12-2015
DOI: 10.1364/OME.5.000073
Towards all-diamond optical devices
Publisher: IEEE
Date: 06-2010
Numerosity Categorization by Parity in an Insect and Simple Neural Network
Publisher: Frontiers Media SA
Date: 29-04-2022
Abstract: A frequent question as technology improves and becomes increasingly complex, is how we enable technological solutions and models inspired by biological systems. Creating technology based on humans is challenging and costly as human brains and cognition are complex. The honeybee has emerged as a valuable comparative model which exhibits some cognitive-like behaviors. The relative simplicity of the bee brain compared to large mammalian brains enables learning tasks, such as categorization, that can be mimicked by simple neural networks. Categorization of abstract concepts can be essential to how we understand complex information. Odd and even numerical processing is known as a parity task in human mathematical representations, but there appears to be a complete absence of research exploring parity processing in non-human animals. We show that free-flying honeybees can visually acquire the capacity to differentiate between odd and even quantities of 1–10 geometric elements and extrapolate this categorization to the novel numerosities of 11 and 12, revealing that such categorization is accessible to a comparatively simple system. We use this information to construct a neural network consisting of five neurons that can reliably categorize odd and even numerosities up to 40 elements. While the simple neural network is not directly based on the biology of the honeybee brain, it was created to determine if simple systems can replicate the parity categorization results we observed in honeybees. This study thus demonstrates that a task, previously only shown in humans, is accessible to a brain with a comparatively small numbers of neurons. We discuss the possible mechanisms or learning processes allowing bees to perform this categorization task, which range from numeric explanations, such as counting, to pairing elements and memorization of stimuli or patterns. The findings should encourage further testing of parity processing in a wider variety of animals to inform on its potential biological roots, evolutionary drivers, and potential technology innovations for concept processing.
Coherent Population Trapping of Single Spins in Diamond under Optical Excitation
Publisher: American Physical Society (APS)
Date: 13-12-2006
Quantum Bocce: Magnon-magnon collisions between propagating and bound states in 1D spin chains
Publisher: Elsevier BV
Date: 08-2013
Optical properties of neodymium ions in nanoscale regions of gallium nitride: erratum
Publisher: The Optical Society
Date: 25-01-2021
Identifying a two-state Hamiltonian in the presence of decoherence
Publisher: American Physical Society (APS)
Date: 27-06-2006
Energetics of the quantum graphity universe
Publisher: American Physical Society (APS)
Date: 12-2014
Photonic module: An on-demand resource for photonic entanglement
Publisher: American Physical Society (APS)
Date: 16-11-2007
Guided magnon transport in spin chains: Transport speed and correcting for disorder
Publisher: American Physical Society (APS)
Date: 10-02-2015
Atom–Photon Coupling from Nitrogen-vacancy Centres Embedded in Tellurite Microspheres
Publisher: Springer Science and Business Media LLC
Date: 22-06-2015
DOI: 10.1038/SREP11486
Abstract: We have developed a technique for creating high quality tellurite microspheres with embedded nanodiamonds (NDs) containing nitrogen-vacancy (NV) centres. This hybrid method allows fluorescence of the NVs in the NDs to be directly, rather than evanescently, coupled to the whispering gallery modes of the tellurite microspheres at room temperature. As a demonstration of its sensing potential, shifting of the resonance peaks is also demonstrated by coating a sphere surface with a liquid layer. This new approach is a robust way of creating cavities for use in quantum and sensing applications.
Splitting of photoluminescent emission from nitrogen–vacancy centers in diamond induced by ion-damage-induced stress
Publisher: IOP Publishing
Date: 17-04-2013
Single-shot readout with the radio-frequency single-electron transistor in the presence of charge noise
Publisher: AIP Publishing
Date: 04-2005
DOI: 10.1063/1.1897423
Abstract: The radio-frequency single-electron transistor (rf-SET) possesses key requirements necessary for reading out a solid state quantum computer. This work explores the use of the rf-SET as a single-shot readout device in the presence of 1∕f and telegraph charge noise. For a typical spectrum of 1∕f noise we find that high fidelity, single-shot measurements are possible for signals Δq& .01e. For the case of telegraph noise, we present a cross-correlation measurement technique that uses two rf-SETs to suppress the effect of random switching events on readout. We demonstrate this technique by monitoring the charge state of a metal double dot system on microsecond time scales. Such a scheme will be advantageous in achieving high readout fidelity in a solid-state quantum computer.
Dynamic Stabilization of the Optical Resonances of Single Nitrogen-Vacancy Centers in Diamond
Publisher: American Physical Society (APS)
Date: 14-05-2012
Current suppression in a double-island single-electron transistor for detection of degenerate charge configurations of a floating double-dot
Publisher: AIP Publishing
Date: 24-11-2003
DOI: 10.1063/1.1630382
Abstract: We have investigated a double-island single-electron transistor (DISET) coupled to a floating metal double-dot (DD). Low-temperature transport measurements were used to map out the charge configurations of both the DISET and the DD. A suppression of the current through the DISET was observed whenever the charge configurations of the DISET and the DD were energetically codegenerate. This effect was used to distinguish between degenerate and nondegenerate charge configurations of the DD. We also show that this detection scheme reduces the susceptibility of the DISET to interference from random charge noise.
Intensity-dependent dispersion under conditions of electromagnetically induced transparency in coherently prepared multistate atoms
Publisher: American Physical Society (APS)
Date: 28-02-2003
Nanodiamond-polycaprolactone composite: A new material for tissue engineering with sub-dermal imaging capabilities
Publisher: Elsevier BV
Date: 12-2016
Stimulated emission from nitrogen-vacancy centres in diamond
Publisher: Springer Science and Business Media LLC
Date: 27-01-2017
DOI: 10.1038/NCOMMS14000
Two-dimensional architectures for donor-based quantum computing
Publisher: American Physical Society (APS)
Date: 17-07-2006
Spin guides and spin splitters: Waveguide analogies in one-dimensional spin chains
Publisher: American Physical Society (APS)
Date: 05-01-2012
Parallel interaction-free measurement using spatial adiabatic passage
Publisher: IOP Publishing
Date: 06-12-2011
Band structure, phase transitions, and semiconductor analogs in one-dimensional solid light systems
Publisher: American Physical Society (APS)
Date: 28-12-2009
Optomechanics with electromechanical parametric amplification
Publisher: IEEE
Date: 08-2011
Nanodiamond in tellurite glass Part I: origin of loss in nanodiamond-doped glass
Publisher: The Optical Society
Date: 24-11-2014
DOI: 10.1364/OME.4.002608
Dielectric resonator nanoantennas at visible frequencies
Publisher: The Optical Society
Date: 11-01-2013
DOI: 10.1364/OE.21.001344
Quantum phase transitions in photonic cavities with two-level systems
Publisher: American Physical Society (APS)
Date: 21-05-2008
Nanodiamond arrays on glass for quantification and fluorescence characterisation
Publisher: Springer Science and Business Media LLC
Date: 23-08-2017
DOI: 10.1038/S41598-017-09457-X
Abstract: Quantifying the variation in emission properties of fluorescent nanodiamonds is important for developing their wide-ranging applicability. Directed self-assembly techniques show promise for positioning nanodiamonds precisely enabling such quantification. Here we show an approach for depositing nanodiamonds in pre-determined arrays which are used to gather statistical information about fluorescent lifetimes. The arrays were created via a layer of photoresist patterned with grids of apertures using electron beam lithography and then drop-cast with nanodiamonds. Electron microscopy revealed a 90% average deposition yield across 3,376 populated array sites, with an average of 20 nanodiamonds per site. Confocal microscopy, optimised for nitrogen vacancy fluorescence collection, revealed a broad distribution of fluorescent lifetimes in agreement with literature. This method for statistically quantifying fluorescent nanoparticles provides a step towards fabrication of hybrid photonic devices for applications from quantum cryptography to sensing.
Optical fibre coated with diamond nanocrystal: Novel sensing architecture
Publisher: IEEE
Date: 08-2011
Atom-photon coupling from nitrogen-vacancy centers embedded in tellurite microspheres
Publisher: OSA
Date: 2015
Engineering electromagnetic metamaterials from coupled cavity arrays
Publisher: IEEE
Date: 08-2011
Phase transitions in systems of interacting photons: quantum optics, quantum information, condensed matter and the Jaynes-Cummings-Hubbard model
Publisher: SPIE
Date: 19-08-2010
DOI: 10.1117/12.860111
Refractive index variation in a free-standing diamond thin film induced by irradiation with fully transmitted high-energy protons
Publisher: Springer Science and Business Media LLC
Date: 24-03-2017
DOI: 10.1038/S41598-017-00343-0
Abstract: Ion irradiation is a widely employed tool to fabricate diamond micro- and nano-structures for applications in integrated photonics and quantum optics. In this context, it is essential to accurately assess the effect of ion-induced damage on the variation of the refractive index of the material, both to control the side effects in the fabrication process and possibly finely tune such variations. Several partially contradictory accounts have been provided on the effect of the ion irradiation on the refractive index of single crystal diamond. These discrepancies may be attributable to the fact that in all cases the ions are implanted in the bulk of the material, thus inducing a series of concurrent effects (volume expansion, stress, doping, etc.). Here we report the systematic characterization of the refractive index variations occurring in a 38 µm thin artificial diamond s le upon irradiation with high-energy (3 MeV and 5 MeV) protons. In this configuration the ions are fully transmitted through the s le, while inducing an almost uniform damage profile with depth. Therefore, our findings conclusively identify and accurately quantify the change in the material polarizability as a function of ion beam damage as the primary cause for the modification of its refractive index.
Creating diamond color centers for quantum optical applications
Publisher: Elsevier BV
Date: 11-2007
Identifying an experimental two-state Hamiltonian to arbitrary accuracy
Publisher: American Physical Society (APS)
Date: 14-06-2005
Coherent electronic transfer in quantum dot systems using adiabatic passage
Publisher: American Physical Society (APS)
Date: 15-12-2004
Acoustically tunable optical transmission through a subwavelength hole with a bubble
Publisher: American Physical Society (APS)
Date: 13-03-2017
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Open University
Location: United Kingdom of Great Britain and Northern Ireland
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