Abstract The following topics are dealt with: microresonators; photonic molecules; photonic cryst... more Abstract The following topics are dealt with: microresonators; photonic molecules; photonic crystals; optical networks and systems; optical fiber communications; optical fiber devices; fiber lasers and amplifiers; integrated photonic circuits; wavelength-division multiplexing; microwave photonics; and radio-over-fiber networks
... The paper reports on a free space quantum cryptography experiment over a distance of 24.3 ...... more ... The paper reports on a free space quantum cryptography experiment over a distance of 24.3 ... bit error rates , compact modules , error correction , free space quantum cryptography , photon number ... Your institute subscribes to: IEEE/IET Electronic Library (IEL); What can I access? ...
1. Introduction Highly efficient single photon sources with controlled quantum states are attract... more 1. Introduction Highly efficient single photon sources with controlled quantum states are attracting ever growing interest due to their importance in quantum cryptography [1], quantum computation [2] and quantum optics [3]. Here, microcavity pillars with elliptical cross-section are shown ...
Historically non-classical sources of single photons have been used to test quantum mechanics and... more Historically non-classical sources of single photons have been used to test quantum mechanics and to develop the field of quantum optics. Nowadays the single photon source has become a critical device for quantum communications and optical quantum information processing [Knill, et al., 2001]. A single photon source emits one photon at a time, and its quality can be evaluated by three parameters: quantum efficiency, multi-photon probability, and photon distinguishability. Among the different types single photon sources, InGaAs/GaAs quantum dots (QDs) are a promising solid state candidate showing high quantum efficiency, no bleaching effect, long-term stability, capable of high repetition rate, and compatible with standard semiconductor processing techniques. Furthermore, QDs can be embedded in micro-cavities or photonic crystal nano-cavities by in situ growth, and thus cavity quantum electrodynamics (CQED) can be exploited to improve the performance of QD-based single photon sources in all aspects mentioned above [Santori, et al., 2002].
Alberto Politi, Jonathan CF Matthews, Anthony Laing, Alberto Peruzzo, Pruet Kalasuwan, Mian Zhang... more Alberto Politi, Jonathan CF Matthews, Anthony Laing, Alberto Peruzzo, Pruet Kalasuwan, Mian Zhang, Xiao-Qi Zhou, Maria Rodas, Martin J. Cryan, John G. Rarity, Andre Stefanov, Siyuan Yu, Mark G. Thompson and Jeremy L. O'Brien. Centre for Quantum Photonics, HH Wills Physics Laboratory & Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol, BS8 1UB, UK, Email: Jeremy.OBrien@bristol.ac . Abstract: Quantum technologies based on photons will likely require integrated optics ...
Single photons are at the heart of optical quantum technologies such as quantum cryptography, qua... more Single photons are at the heart of optical quantum technologies such as quantum cryptography, quantum computing and quantum metrology. In this paper we report on the creation of photon pairs via four-wave-mixing (FWM) in birefringent photonic crystal fibres (PCF). It has recently been suggested that for thoroughly engineering the phase matching condition of a birefringent PCF, photon pairs can by
Optically active 'color' centers in diamond may be individually... more Optically active 'color' centers in diamond may be individually addressed using standard confocal fluorescence mi-croscopy techniques, allowing optical access to a solid state quantum system, with several species capable of room temperature stable single photon emission. ...
Abstract Optical quantum technologies require new photonic components to exploit integrated archi... more Abstract Optical quantum technologies require new photonic components to exploit integrated architecture. We demonstrate quantum interference in MMI couplers and coupled waveguides that implement two-particle quantum walks, showing unique quantum behaviour.
Understanding far and close proximity human-human interaction observed from a distance is a neces... more Understanding far and close proximity human-human interaction observed from a distance is a necessary step towards automated suspicious or antisocial behaviour detection. Most previous work on human-human interaction has made the implicit assumption that interactions occur only at immediate spatial and temporal proximity between the subjects concerned. We propose a more realistic application of human-human interaction detection from surveillance data where the subjects of interest tend to be represented by few pixels ...
Abstract The following topics are dealt with: microresonators; photonic molecules; photonic cryst... more Abstract The following topics are dealt with: microresonators; photonic molecules; photonic crystals; optical networks and systems; optical fiber communications; optical fiber devices; fiber lasers and amplifiers; integrated photonic circuits; wavelength-division multiplexing; microwave photonics; and radio-over-fiber networks
... The paper reports on a free space quantum cryptography experiment over a distance of 24.3 ...... more ... The paper reports on a free space quantum cryptography experiment over a distance of 24.3 ... bit error rates , compact modules , error correction , free space quantum cryptography , photon number ... Your institute subscribes to: IEEE/IET Electronic Library (IEL); What can I access? ...
1. Introduction Highly efficient single photon sources with controlled quantum states are attract... more 1. Introduction Highly efficient single photon sources with controlled quantum states are attracting ever growing interest due to their importance in quantum cryptography [1], quantum computation [2] and quantum optics [3]. Here, microcavity pillars with elliptical cross-section are shown ...
Historically non-classical sources of single photons have been used to test quantum mechanics and... more Historically non-classical sources of single photons have been used to test quantum mechanics and to develop the field of quantum optics. Nowadays the single photon source has become a critical device for quantum communications and optical quantum information processing [Knill, et al., 2001]. A single photon source emits one photon at a time, and its quality can be evaluated by three parameters: quantum efficiency, multi-photon probability, and photon distinguishability. Among the different types single photon sources, InGaAs/GaAs quantum dots (QDs) are a promising solid state candidate showing high quantum efficiency, no bleaching effect, long-term stability, capable of high repetition rate, and compatible with standard semiconductor processing techniques. Furthermore, QDs can be embedded in micro-cavities or photonic crystal nano-cavities by in situ growth, and thus cavity quantum electrodynamics (CQED) can be exploited to improve the performance of QD-based single photon sources in all aspects mentioned above [Santori, et al., 2002].
Alberto Politi, Jonathan CF Matthews, Anthony Laing, Alberto Peruzzo, Pruet Kalasuwan, Mian Zhang... more Alberto Politi, Jonathan CF Matthews, Anthony Laing, Alberto Peruzzo, Pruet Kalasuwan, Mian Zhang, Xiao-Qi Zhou, Maria Rodas, Martin J. Cryan, John G. Rarity, Andre Stefanov, Siyuan Yu, Mark G. Thompson and Jeremy L. O'Brien. Centre for Quantum Photonics, HH Wills Physics Laboratory & Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol, BS8 1UB, UK, Email: Jeremy.OBrien@bristol.ac . Abstract: Quantum technologies based on photons will likely require integrated optics ...
Single photons are at the heart of optical quantum technologies such as quantum cryptography, qua... more Single photons are at the heart of optical quantum technologies such as quantum cryptography, quantum computing and quantum metrology. In this paper we report on the creation of photon pairs via four-wave-mixing (FWM) in birefringent photonic crystal fibres (PCF). It has recently been suggested that for thoroughly engineering the phase matching condition of a birefringent PCF, photon pairs can by
Optically active 'color' centers in diamond may be individually... more Optically active 'color' centers in diamond may be individually addressed using standard confocal fluorescence mi-croscopy techniques, allowing optical access to a solid state quantum system, with several species capable of room temperature stable single photon emission. ...
Abstract Optical quantum technologies require new photonic components to exploit integrated archi... more Abstract Optical quantum technologies require new photonic components to exploit integrated architecture. We demonstrate quantum interference in MMI couplers and coupled waveguides that implement two-particle quantum walks, showing unique quantum behaviour.
Understanding far and close proximity human-human interaction observed from a distance is a neces... more Understanding far and close proximity human-human interaction observed from a distance is a necessary step towards automated suspicious or antisocial behaviour detection. Most previous work on human-human interaction has made the implicit assumption that interactions occur only at immediate spatial and temporal proximity between the subjects concerned. We propose a more realistic application of human-human interaction detection from surveillance data where the subjects of interest tend to be represented by few pixels ...
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