A5001955862- Photonic and Optical Devices
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Semiconductor Lasers and Optical Devices
- Optical Coatings and Gratings
- Advanced Fiber Laser Technologies
- Plasmonic and Surface Plasmon Research
- Advanced Photonic Communication Systems
- Metamaterials and Metasurfaces Applications
- Advanced MRI Techniques and Applications
- Neural Networks and Reservoir Computing
- Advanced Antenna and Metasurface Technologies
- Photonic Crystals and Applications
- MRI in cancer diagnosis
- Lymphatic System and Diseases
- Integrated Circuits and Semiconductor Failure Analysis
- Polysaccharides and Plant Cell Walls
- Sympathectomy and Hyperhidrosis Treatments
- Congenital heart defects research
- Ocular Surface and Contact Lens
- Mechanical and Optical Resonators
- Pulmonary Hypertension Research and Treatments
- Radiomics and Machine Learning in Medical Imaging
- Millimeter-Wave Propagation and Modeling
- Analytical Chemistry and Sensors
Chinese University of Hong Kong
2021-2025
Sun Yat-sen University
2022-2025
Southeast University
2019-2020
Huazhong University of Science and Technology
2014-2017
Wuhan National Laboratory for Optoelectronics
2017
Quantum networks provide the framework for quantum communication, clock synchronization, distributed computing, and sensing. Implementing large-scale practical relies on development of scalable architecture integrated hardware that can coherently interconnect many remote nodes by sharing multidimensional entanglement through complex-medium channels. We demonstrate a multichip network based mass-manufacturable integrated-nanophotonic node chips fabricated silicon wafer means complementary...
Reduction of propagation loss terahertz graphene plasmon can be made by increasing the chemical potential layer, but at cost significantly increased modal area, which fundamentally limits packing density on a chip. By utilizing strong coupling between dielectric waveguide and plasmonic modes, we propose hybrid waveguides that not only suppress mode field confinement, also maintain compact size. A typical length is 127 μm, optical confined into an ultra-small area approximately 32.6 μm <sup...
We propose and validate a new, to the best of our knowledge, approach for increasing coupling efficiency waveguide grating couplers by introducing an optimized shift-patterned polysilicon overlay above silicon structure. After optimizing shifts in position duty cycles each period grating, can form composite subwavelength structures which improve both mode matching directionality coupler, enable design high-efficiency perfectly vertical coupler (PVGC) with -0.91 dB simulated efficiency. The...
Lymphatic vessels are responsible for tissue drainage, and their malfunction is associated with chronic diseases. Lymph uptake occurs via specialized open cell-cell junctions between capillary lymphatic endothelial cells (LECs), whereas closed in collecting LECs prevent lymph leakage. LEC known to dynamically remodel development disease, but how permeability regulated remains poorly understood.
Abstract Leveraging on the mature processing infrastructure of silicon microelectronics, photonic integrated circuits may be readily scaled to large volume production for low-cost high-volume applications such as optical transceivers data centers. Driven by rapid growth generative artificial intelligence and resultant increase in traffic centers, new will needed support multichannel high-capacity communications beyond 1.6Tb/s. In this paper, we review some recent advances high performance...
Multimode silicon resonators with ultralow propagation losses for ultrahigh quality (Q) factors have been attracting attention recently. However, conventional multimode only high Q at certain wavelengths because the are reduced where fundamental modes and higher-order both near resonances. Here, by implementing a broadband pulley directional coupler concentric racetracks, we present high-Q resonator average loaded of 1.4 × 106 over wavelength range 440 nm (1240-1680 nm). The mutual coupling...
We describe a novel high coupling efficiency multimode waveguide grating coupler which uses polysilicon overlay numerically optimized to improve both the directivity and mode-matching of with different modes. The device was realized experimentally designed large minimum feature size 181 nm for fabrication by deep ultraviolet photolithography in commercial foundry. Simulations predicted efficiencies be −1.1 dB LP <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
Using the optimized shift-pattern overlay method, we present a new high-efficiency silicon waveguide grating coupler operating at 1550 nm center wavelength, which has simulation predicted coupling loss of 0.68 dB and experimentally measured 0.89 dB. This record result was achieved without any substrate bottom mirrors or use electron beam lithography fabricated with standard processes multi-project wafer fabrication service from commercial foundry.
We propose and validate a new, to the best of our knowledge, approach for high coupling efficiency (CE) grating couplers (GCs) in lithium niobate on insulator photonic integration platform. Enhanced CE is achieved by increasing strength using refractive index polysilicon layer GC. Due layer, light waveguide pulled up region. The optical cavity formed vertical direction enhances With this novel structure, simulations predicted be -1.40 dB, while experimentally measured was -2.20 dB with 3-dB...
Abstract We propose and validate a new approach for wideband waveguide grating couplers (GC). The operation is achieved using slot structure above the conventional channel waveguide. With this structure, both strength, mode effective index dispersion in region can be flexibly tuned to enable high coupling efficiency operation. 3D FDTD simulations predicted of −4.08 dB with unprecedented 1 bandwidth 229 nm. experimental result standard single fiber C band lithium niobate −4.47 171 nm 3 over...
BACKGROUND: Aberrant BMPR2 (bone morphogenetic protein receptor 2) signaling is associated with the pathogenesis of pulmonary hypertension. SMAD4 an essential downstream effector signaling, but whether and how it participates in hypertension are unclear. METHODS: Globally vascular cell-specifically inducible knockout mouse models were used to examine role deficiency differential cell compartments development Single-cell transcriptomic analysis combination vitro function measurements was...
We propose and demonstrate an ultrabroad terahertz (THz) bandpass filter (BPF) by integrating two different-sized tapered hyperbolic metamaterial (HMM) waveguides, each of which has wide but different absorption transmission bands, into a unit cell. With proper structural design HMM waveguide to control the we numerically designed BPF is capable operating with broad passband in THz domain. A typical TM-polarized peak 37% at 3.3 bandwidth 2.2 ranging from 2.97 5.17 THz. The co-designed...
A dynamically tunable electromagnetically induced transparency (EIT) system consisting of two coupled micro-ring resonators, one which is embedded with a graphene layer, proposed and numerically demonstrated. The effective refractive index the graphene-based resonator can be significantly tuned by varying gate voltage applied on graphene, inducing significant modulation resonant wavelength EIT window over wide spectral bandwidth. Typical tunability resonance approximately 1.62 nm/V around...
Miniaturized spectrometers on an integrated chip have many applications, such as material discrimination and portable sensing. However, it is challenging to achieve high resolution ultrasmall footprint simultaneously in a spectrometer, because reducing its size results concomitant degradation of or bandwidth. Here, we proposed experimentally demonstrated photonic network for high-resolution spectral reconstruction. The network, which consists inverse-designed components with reduced...
The mode field distribution at the distal end of a multimode fiber can vary randomly when environmental perturbations introduce changes in relative phases different eigenmodes and variations coupling among modes. Random rotations high-order mode-field produce large losses waveguide grating coupler (MWGC) fiber-chip interface. In this paper, we propose solution to problem by using novel approach based on controlling amplitudes modes launched proximal fiber. We implemented an integrated mesh...
We propose a novel high performance dual polarization waveguide grating coupler that can be fabricated by deep UV photolithography for perfectly vertical coupling to standard single mode fiber with efficiency and low dependent loss.
We propose and validate a new, to the best of our knowledge, approach designing polarization-independent waveguide grating coupler, using an optimized polysilicon overlay on silicon structure. Simulations predicted coupling efficiencies about −3.6 dB −3.5 for TE TM polarizations, respectively. The devices were fabricated photolithography in multi-project wafer fabrication service by commercial foundry have measured losses −3.96 polarization −3.93 polarization.
In this paper, we propose and validate a new approach for increasing the optical bandwidth of waveguide grating couplers by using center-symmetric structure. Our results demonstrate state-of-the-art performance in 1dB to 108 nm experimentally validated coupling efficiency -3.0 dB. The fabrication uses standard MPW service offered commercial foundry with minimum feature size above 181 nm. Such flat wideband high-efficiency is suitable large-volume manufacturing will enable use applications...
We propose an ultrathin and high-efficiency all-metal metasurface polarization converter, by which cross-polarization conversion in reflection mode is achieved for linearly-polarized lights. The simulated result shows that the ratio normal incidence nearly 100% visible region. Moreover, strong coupling between nanobars with metallic ground plane, make it possible to provide novel application of in-band switch function. proposed converter not only improves feasibility nanofabrication due its...
Diffusion-Weighted Imaging (DWI) of the prostate is commonly used for tumor detection and characterization. However, echo planar imaging (EPI) based DWI methods in fail setting field inhomogeneities most related to hip prosthesis rectal gas. Cartesian Fast Spin-Echo (FSE) an alternative EPI that more robust off-resonance. In this study, we compare vivo 3D FSE multi-shot (MUSE) imaging, demonstrating sequence achieves high image quality while avoiding geometric distortion seen DWI.