A5052966323- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Mechanical and Optical Resonators
- Advanced Optical Sensing Technologies
- Quantum Information and Cryptography
- Advanced Fluorescence Microscopy Techniques
- Superconducting and THz Device Technology
- Plasmonic and Surface Plasmon Research
- Diamond and Carbon-based Materials Research
- Physics of Superconductivity and Magnetism
- Nanowire Synthesis and Applications
- Quantum optics and atomic interactions
- Advanced Photonic Communication Systems
- Gold and Silver Nanoparticles Synthesis and Applications
- Atomic and Subatomic Physics Research
- Laser-Matter Interactions and Applications
- Solid State Laser Technologies
- Acoustic Wave Resonator Technologies
- Metamaterials and Metasurfaces Applications
- Semiconductor Lasers and Optical Devices
- Orbital Angular Momentum in Optics
- Photonic Crystals and Applications
- Optical Network Technologies
- Neural Networks and Reservoir Computing
Agency for Science, Technology and Research
2014-2025
Institute of Materials Research and Engineering
2014-2025
National University of Singapore
2024-2025
Massachusetts Institute of Technology
2016-2024
Harvard University
2006-2024
Soochow University
2024
Centre for Quantum Technologies
2024
Tiangong University
2019-2023
Tianjin University
2019-2023
Wuhan Institute of Technology
2023
We introduce the first plasmonic palette utilizing color generation strategies for photorealistic printing with aluminum nanostructures. Our work expands visible space through spatially mixing and adjusting nanoscale spacing of discrete With as material, we achieved enhanced durability dramatically reduced materials costs our nanostructures compared to commonly used such gold silver, well size regimes scalable higher-throughput approaches photolithography nanoimprint lithography. These...
Electro-optic modulators (EOMs) convert signals from the electrical to optical domain. They are at heart of communication, microwave signal processing, sensing, and quantum technologies. Next-generation EOMs require high-density integration, low cost, high performance simultaneously, which difficult achieve with established integrated photonics platforms. Thin-film lithium niobate (LN) has recently emerged as a strong contender owing its intrinsic electro-optic (EO) efficiency,...
Integrated thin-film lithium niobate (TFLN) photonics has emerged as a promising platform for the realization of high-performance chip-scale optical systems. Of particular importance are TFLN electro-optic modulators featuring high-linearity, low driving voltage and propagation loss. However, fully integrated system requires integration high power, noise, narrow linewidth lasers on chips. Here we achieve this goal, demonstrate high-power with up to 60 mW power in waveguides. We use realize...
Thin-film lithium niobate has shown promise for scalable applications ranging from single-photon sources to high-bandwidth data communication systems. Realization of the next generation high-performance classical and quantum devices, however, requires much lower optical losses than current state art resonator (Q-factor ∼10 million). Yet material limitations ion-sliced thin film have not been explored; therefore, it is unclear how high quality factor can be achieved in this platform. Here,...
Abstract Integrated electro-optic (EO) modulators are fundamental photonics components with utility in domains ranging from digital communications to quantum information processing. At telecommunication wavelengths, thin-film lithium niobate exhibit state-of-the-art performance voltage-length product ( V π L ), optical loss, and EO bandwidth. However, applications imaging, optogenetics, science generally require devices operating the visible-to-near-infrared (VNIR) wavelength range. Here, we...
We demonstrate a wide-bandgap semiconductor photonics platform based on nanocrystalline aluminum nitride (AlN) sapphire. This guides light at low loss from the ultraviolet (UV) to visible spectrum. measure ring resonators with intrinsic quality factor (Q) exceeding 170,000 638 nm and Q >20,000 down 369.5 nm, which shows promising path for low-loss integrated in UV opens up new possibilities quantum optics trapped ions or atom-like color centers solids, as well classical applications...
Linking superconducting quantum devices to optical fibers via microwave-optical transducers may enable large-scale networks. For this application, based on the Pockels electro-optic (EO) effect are promising for their direct conversion mechanism, high bandwidth, and potential low-noise operation. However, previously demonstrated EO require large pump power overcome weak coupling reach efficiency. Here, we create an transducer in thin-film lithium niobate, a platform that provides low loss...
Detection jitter quantifies variance introduced by the detector in determination of photon arrival time. It is a crucial performance parameter for systems using superconducting nanowire single detectors (SNSPDs). In this work, we have demonstrated that detection timing limited part spatial variation events along length wire. We define source as geometric since it related to and area SNSPD. To characterize jitter, constructed differential cryogenic readout with less than 7 ps an electronic...
Strong field enhancement and confinement in plasmonic nanostructures provide suitable conditions for nonlinear optics ultracompact dimensions. Despite these enhancements, second-harmonic generation (SHG) is still inefficient due to the centrosymmetric crystal structure of bulk metals used, e.g., Au Ag. Taking advantage symmetry breaking at metal surface, one could greatly enhance SHG by engineering surfaces regions where strong electric fields are localized. Here, we combine top-down...
We developed superconducting nanowire single-photon detectors based on tungsten silicide, which show saturated internal detection efficiency up to a wavelength of 10 μm. These are promising for applications in the mid-infrared requiring sub-nanosecond timing, ultra-high gain stability, low dark counts, and high efficiency, such as chemical sensing, LIDAR, matter searches, exoplanet spectroscopy.
Lithium niobate (LN), an outstanding and versatile material, has influenced our daily life for decades: from enabling high-speed optical communications that form the backbone of Internet to realizing radio-frequency filtering used in cell phones. This half-century-old material is currently embracing a revolution thin-film LN integrated photonics. The success manufacturing wafer-scale, high-quality, thin films on insulator (LNOI), accompanied with breakthroughs nanofabrication techniques,...
Time- and number-resolved photon detection is crucial for quantum information processing. Existing photon-number-resolving (PNR) detectors usually suffer from limited timing dark-count performance or require complex fabrication operation. Here, we demonstrate a PNR detector at telecommunication wavelengths based on single superconducting nanowire with an integrated impedance-matching taper. The taper provides kΩ load impedance to the nanowire, making detector's output amplitude sensitive...
Abstract Manipulating the frequency and bandwidth of nonclassical light is essential for implementing frequency-encoded/multiplexed quantum computation, communication, networking protocols, bridging spectral mismatch among various systems. However, control requires a strong nonlinearity mediated by light, microwave, or acoustics, which challenging to realize with high efficiency, low noise, on an integrated chip. Here, we demonstrate both shifting compression heralded single-photon pulses...
Abstract Solid‐state quantum emitters are essential sources of single photons, and enhancing their emission rates is paramount importance for applications in communications, computing, metrology. One approach to couple with resonant photonic nanostructures, where the rate enhanced due Purcell effect. Dielectric nanoantennas promising as they provide strong enhancement compared plasmonic ones, which suffer from high Ohmic loss. Here, a dielectric Fano resonator designed fabricated based on...
Millimeter-wave (mmWave) band (30 - 300 GHz) is an emerging spectrum range for wireless communication, short-range radar and sensor applications. mmWave-optic modulators that could efficiently convert mmWave signals into optical domain are crucial components long-haul transmission of through networks. At these ultrahigh frequencies, however, the modulation performances highly sensitive to line loss as well velocity- impedance-matching conditions, while precise measurements modeling...
Existing nonlinear-optic implementations of pure, unfiltered heralded single-photon sources do not offer the scalability required for densely integrated quantum networks. Additionally, lithium niobate has hitherto been unsuitable such use due to its material dispersion. We engineer dispersion and quasi-phasematching conditions a waveguide in rapidly emerging thin-film platform generate spectrally separable photon pairs telecommunications band. Such can be used as pure estimate heralded-state...
Superconducting nanowire single-photon detectors (SNSPDs) are the highest-performance photon-counting technology in near infrared, but traditional designs typically trade off between timing resolution and detection efficiency. The authors utilize transmission-line engineering differential readout to achieve a design with high efficiency low jitter simultaneously. This also enables imaging capabilities photon-number resolution, is compatible commercial time taggers. device versatile solution...