A5070470618- Photonic and Optical Devices
- Quantum Information and Cryptography
- Photonic Crystals and Applications
- Optical Network Technologies
- Neural Networks and Reservoir Computing
- Advanced Fiber Laser Technologies
- Diamond and Carbon-based Materials Research
- Quantum optics and atomic interactions
- Silicon Nanostructures and Photoluminescence
- Photorefractive and Nonlinear Optics
- Advanced Fiber Optic Sensors
- Semiconductor materials and devices
- Advanced Optical Sensing Technologies
- Plasmonic and Surface Plasmon Research
- Mechanical and Optical Resonators
- Laser-Matter Interactions and Applications
- Carbon Nanotubes in Composites
- Quantum and electron transport phenomena
- Thermal Radiation and Cooling Technologies
- Graphene research and applications
- Optical Wireless Communication Technologies
- Semiconductor Lasers and Optical Devices
- Semiconductor Quantum Structures and Devices
Center for Integrated Quantum Science and Technology
2022-2024
Nanyang Technological University
2023
Centre for Quantum Computation and Communication Technology
2021-2022
Griffith University
2020-2022
Australian Research Council
2021-2022
University of Southampton
2017-2021
Quantum (Australia)
2020
Istituto di Fotonica e Nanotecnologie
2019
Integrated photonics is at the heart of many classical technologies, from optical communications to biosensors, LIDAR, and data center fiber interconnects. There strong evidence that these integrated technologies will play a key role in quantum systems as they grow few-qubit prototypes tens thousands qubits. The underlying laser with required functionality performance, can only be realized through integration components onto photonic circuits (QPICs) accompanying electronics. In last decade,...
Silicon carbide is an emerging platform for quantum technologies that provides wafer scale and low-cost industrial fabrication. The material also hosts high-quality defects with long coherence times can be used computation sensing applications. Using ensemble of nitrogen-vacancy centers XY8-2 correlation spectroscopy approach, we demonstrate a room-temperature artificial AC field centered at ~900 kHz spectral resolution 10 kHz. Implementing the synchronized readout technique, further extend...
Nuclear spin polarization plays a crucial role in quantum information processing and sensing. In this work, we demonstrate robust efficient method for nuclear with boron vacancy (VB−) defects hexagonal nitride (h-BN) using ground-state level anticrossing (GSLAC). We show that GSLAC-assisted can be achieved significantly lower laser power than excited-state anticrossing, making the process experimentally more viable. Furthermore, have demonstrated direct optical readout of spins VB− h-BN. Our...
The realization of large-scale photonic circuits for quantum optics experiments at telecom wavelengths requires an increasing number integrated detectors.Superconducting nanowire single photon detectors (SNSPDs) can be easily onchip, and they efficiently detect the light propagating inside waveguides.The thermal budget cryostats poses a limit on maximum elements that same chip due to impact readout electronics.In this paper, we propose implement novel amplitude-multiplexing scheme allowing...
Squeezed light is optical beams with variance below the shot noise level. They are a key resource for quantum technologies based on photons, and they can be used to achieve better precision measurements improve security in distribution channels as fundamental computation. Here, we demonstrate an integrated source of squeezing four-wave mixing that requires single laser pump, measuring 0.45 dB broadband quadrature at high frequencies. We identify verify current results limited by excess...
We experimentally investigate second harmonic generation from strongly coupled localized and propagative phonon-polariton modes in arrays of silicon carbide nanopillars. Our results clearly demonstrate the hybrid nature system's eigenmodes distinct manifestation strong coupling linear nonlinear responses. While reflectivity intensity two branches is essentially symmetric well explained by their respective or components, signal presents a asymmetry. Analyzing it detail, we reveal importance...
High-speed long-range quantum communication requires combining frequency multiplexed photonic channels with memories. We experimentally demonstrate an integrated conversion protocol that can convert between wavelength division multiplexing in the telecom range efficiency of $55\ifmmode\pm\else\textpm\fi{}8%$ and a noise subtracted Hong-Ou-Mandel (HOM) dip visibility 84.5%. This is based on cascaded second order nonlinear interaction be used to interface broad spectrum frequencies narrowband...
We present interlayer slope waveguides, designed to guide light from one level another in a multi-layer silicon photonics platform. The waveguide is fabricated hydrogenated amorphous (a-Si:H) film, deposited using hot-wire chemical vapor deposition (HWCVD) at temperature of 230°C. comprises lower input and an upper output waveguide, connected by on slope, with vertical separation isolate other crossing waveguides. Measured loss 0.17 dB/slope was obtained for dimensions 600 nm width (w) 400...
Solid state quantum emitters are between the most promising candidates for single photon generation in technologies. However, they suffer from decoherence effects which limit their efficiency and indistinguishability. For instance, radiation emitted zero phonon line (ZPL) of color centers is on order a few percent (e.g. $NV^-$ Diamond, $V_{Si}V_{C}$ SiC) limiting emission rate photons as well efficiency. At same time, reliable interfacing with an integrated manner still remains challenge...
We demonstrate on-chip generation of correlated pairs photons in the near-visible spectrum using a CMOS compatible plasma-enhanced chemical vapor deposition silicon nitride photonic device. Photons are generated via spontaneous four wave mixing enhanced by ring resonator with high intrinsic quality Q-factor 3,20,000, resulting rate 950,000 pairsmW. The brightness this source offers opportunity to expand quantum technologies over broad wavelength range and provides path develop fully...
Abstract Achieving a high level of pulsed squeezing, in platform which offers integration and stability, is key requirement for continuous-variable quantum information processing. Typically highly squeezed states are achieved with narrow band optical cavities bulk crystals, limiting scalability. Using single-pass parametric down conversion an integrated device, we demonstrate quadrature squeezing picosecond pulses thin-film lithium niobate strip-loaded waveguide. For on-chip peak powers less...
Silicon carbide (SiC) displays a unique combination of optical and spin-related properties that make it interesting for photonics quantum technologies. However, guiding light by total internal reflection can be difficult to achieve, especially when SiC is grown as thin films on higher index substrates, such silicon. Fabricating suspended subwavelength waveguides requires single lithography step offers solution the confinement problem, while preserving design flexibility required scalable...
Nuclear spin polarization plays a crucial role in quantum information processing and sensing. In this work, we demonstrate robust efficient method for nuclear with boron vacancy ($\mathrm{V_B^-}$) defects hexagonal nitride (h-BN) using ground-state level anti-crossing (GSLAC). We show that GSLAC-assisted can be achieved significantly lower laser power than excited-state anti-crossing, making the process experimentally more viable. Furthermore, have demonstrated direct optical readout of...
We present an interlayer slope waveguide, designed to guide light from one level another in a multilayer silicon photonics platform. The waveguide is fabricated using HWCVD a-Si:H at 350 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</sup> C. Measured loss of 0.5 dB/slope was obtained wavelength 1550 nm and for TE mode polarization.
Squeezed light are optical beams with variance below the Shot Noise Level. They a key resource for quantum technologies based on photons, they can be used to achieve better precision measurements, improve security in distribution channels and as fundamental computation. To date, majority of experiments squeezed have been non-linear crystals discrete components, integration quadrature states nanofabrication-friendly material is challenging technological task. Here we measure 0.45 dB GHz-broad...
The quest to enlarge the capabilities of quantum information experiments based on non-classical states light has directed research toward an integrated approach. Thanks photonics circuits, photons can be efficiently generated, manipulated and detected within same chip. SNSPDs are unique detectors that showed integration compatibility with standard PICs. Nowadays increasing complexity optics requires manipulation many modes simultaneous readout number (N) detectors, thus posing new challenges...
Single photon sources are crucial components for any future quantum photonic technology. Here we demonstrate on-chip generation of non-classical states light computation using CMOS compatible PECVD SiN ring resonator at near-visible wavelengths.
This publisher's note corrects an error in the abstract Opt. Lett.43, 855 (2018)OPLEDP0146-959210.1364/OL.43.000855.
The realization of large-scale photonic circuits for quantum optics experiments requires an increasing number integrated detectors. Superconducting nanowire single photon detectors (SNSPDs) can be easily on chip to efficiently detect the light propagating inside waveguides. In this paper, we propose and implement a novel amplitude-multiplexing scheme allowing efficient readout several SNSPDs with only one coaxial cable.