A5068268762- Photonic and Optical Devices
- Quantum Information and Cryptography
- Neural Networks and Reservoir Computing
- Advanced Fiber Laser Technologies
- Mechanical and Optical Resonators
- Quantum optics and atomic interactions
- Advanced Optical Sensing Technologies
- Optical Network Technologies
- Semiconductor Lasers and Optical Devices
- Radiation Detection and Scintillator Technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Analytical Chemistry and Sensors
- Quantum Computing Algorithms and Architecture
- Quantum-Dot Cellular Automata
- Advancements in Semiconductor Devices and Circuit Design
- Random lasers and scattering media
- Photorefractive and Nonlinear Optics
- Quantum Mechanics and Applications
- Semiconductor Quantum Structures and Devices
- Microfluidic and Bio-sensing Technologies
- Photoacoustic and Ultrasonic Imaging
- Sensor Technology and Measurement Systems
- Electrowetting and Microfluidic Technologies
- Photoreceptor and optogenetics research
- Spectroscopy Techniques in Biomedical and Chemical Research
University of Bristol
2017-2024
Heriot-Watt University
2021
Bristol Robotics Laboratory
2018-2020
Quantum Technology Sciences (United States)
2018
High visibility on-chip quantum interference among indistinguishable single-photons from multiples sources is a key prerequisite for integrated linear optical computing. Resonant enhancement in micro-ring resonators naturally enables brighter, purer and more single-photon production without any tight spectral filtering. The indistinguishability of heralded multiple has not been measured photonic platform. Here, we report measurements generated independent by using an Mach-Zehnder...
High-visibility quantum interference (indistinguishability) among single photons is the key to scalable, high-fidelity linear optical gates. Measuring indistinguishability by laborious and time-consuming, though, thus not scalable. The authors find that faster, simpler second-order correlation functions provide results equivalent indistinguishability, could be useful in rapid-prototyping source design of large-scale photonic circuits. Also, for mature guided-wave integrated optics such as...
Single-photons with high spectro-temporal purity are an essential resource for quantum photonic technologies. The highest reported up until now from a conventional silicon device is 92% without any spectral filtering. We have experimentally generated and observed single-photons 98.0±0.3% purity, upper bound of the stimulated emission tomography, using micro-racetrack resonator engineered dual pump pulse.
Integrated photonics is a powerful contender in the race for fault-tolerant quantum computer, claiming to be platform capable of scaling necessary number qubits. This necessitates use high-quality states, which we create here using an all-around high-performing photon source on integrated platform. We photonic molecule architecture and broadband directional couplers protect against fabrication tolerances ensure reliable operation. As result, simultaneously measure spectral purity 99.1±0.1%,...
Quantum entanglement and teleportation are the key resources building backbone of quantum technologies, such communications, networks, computations. The communication networks based on long-range distribution entangled photons photon qubit states. resource efficient measurement-based computing models relies cluster states logical operations between sites. Silicon photonics provides a versatile platform for information processing chip, thanks to CMOS-compatible fabrication process, ability...
Silicon quantum photonics, capable to integrate large numbers of optical components with CMOS-compatible fabrication technology and reliable control states, is expected play a critical role in future communication. In this talk, we will introduce our recent results silicon photonics for communication, including high-dimensional chip-to-chip key distribution, teleportation, on-chip generation entanglement, Hong-Ou-Mandel interference between two different III-V/silicon hybrid lasers towards...
Abstract In this paper, we report, for the first time, a theoretical study on passive photonic devices including optical power splitters/combiners and grating couplers (GCs) operating at non-telecom wavelengths above 2 µ m in monolithic GaSb platform. Passive components were designed to operate, particular, around 2.6 integration with active III–V gallium antimonide material The three popular types of such as directional couplers, multimode interferometer-, Y-branch-couplers theoretically...
Abstract We present a method of tomography in which photon pairs from device-under-test (DUT) are experimentally characterised by quantum interference with reference pair source; we call this quantum-referenced spontaneous emission (Q-SpET). In Q-SpET, the joint spectral phase (JSP) generated DUT can be reconstructed combining four spectrally resolved interferograms. demonstrate theoretically and experimentally, characterising JSP microresonator source. Our is fully implemented on chip,...
We present our recent study on silicon integrated quantum photonics, from single photon sources to applications of communication, generation and manipulation high-dimensional entanglement states, sampling state light.
Here, we show photon pair generation from ring resonator and waveguide structures in a hybrid silicon–BTO on an insulator platform with pulsed pump. Our analysis of single coincidence rates that spontaneous four-wave mixing is comparable to expected SOI devices similar characteristics find γeff (14.7 ± 1.3) (2.0 0.3) MHz/mW2 for structures, respectively.
Nonlinear interference in silicon integrated photonic devices can be used for high sensitivity gas detection. By analyzing the change signal fringes we quantify variation intensity of an idler beam which interacts with a gas, without direct
Here we show photon pair generation from ring resonator and waveguide structures in a hybrid silicon-BTO on insulator platform with pulsed pump. Our analysis of single coincidence rates that Spontaneous Four-Wave Mixing is comparable to expected SOI devices similar characteristics find $\gamma_{eff}$ (14.7 $\pm$ 1.3) (2.0 0.3) MHz/mW$^{2}$ for respectively.
Photonic Integrated Circuits (PIC)s are a promising contender for quantum information technologies. The spectral purity of photons is one the key attributes PIC photon-pair sources. dual-pulse pump manipulation technique [1] showed >99% in ring-resonator Here, we have developed to shape pulse into dual, triple and quadruple pulses investigated effect these configurations on purity. Our results show that more complex over do not result comparatively higher but allow accurate control choosing...
Photonic integrated circuits for green light generation through up-conversion of on-chip near-infrared lasers are designed using SiN-LN hybrid waveguides. A Fabry-Pérot microcavity-based technique is employed to enhance the nonlinear conversion efficiency.
Light at mid-wave infrared- as well visible-wavelengths are widely used in biophotonic applications with the promise of much improved healthcare. This talk will review on recent progress made OSU towards developing photonic integrated circuit technologies these wavelengths.
The security proofs of the Quantum Key Distribution (QKD) protocols make certain assumptions about operations physical systems. Thus, appropriate modelling devices to ensure that their are consistent with models assumed in proof is imperative. In this paper, we explore Trojan horse attack (THA) using Measurement Device Independent (MDI) QKD integrated photonic chips and how avoid some vulnerabilities only on-chip components. We show a monitor photodiode paired appropriately enough optical...
The development of ideal sources is a fundamental challenge for the practical implementation integrated photonic technologies quantum applications. In this paper we analyse state-of-the-art in heralded single photon sources; pointing out inconsistencies how key parameters, such as brightness and heralding efficiency, are characterised. We then suggest considerations that could be made to facilitate fairer comparison between literature results.
Photonic Integrated Circuits (PICs) are a promising contender for quantum information technologies. The spectral purity of photons is one the key attributes photon-pair sources based on nonlinear optics. We can obtain >99% in PIC ring-resonator by manipulating pump pulse time domain. Here, we have developed to shape into dual, triple, and quadruple pulses investigated effect these configurations purity. Our results show that more complex configurations, compared two-pulse...
We report the first experimental demonstration of chip-to-chip teleportation quantum states light. Integrated transceivers in silicon are able to prepare, manipulate, distribute and transceive photonic with high fidelity.
A fully-functional photonic integrated circuit (PIC) platform with supporting active and passive components in the extended short- mid-wave infrared spectral regime is of significant research interest for next-generation optical systems. Here we design offset quantum well-based circuits which primarily consist four section-based widely tunable single-mode lasers emitting at 2560 nm. The requires selective removal InGaAsSb multi-quantum wells located above a GaSb-based waveguide layer then...