A5103162884- Semiconductor Lasers and Optical Devices
- Photonic and Optical Devices
- Semiconductor Quantum Structures and Devices
- GaN-based semiconductor devices and materials
- Graphene research and applications
- ZnO doping and properties
- Ga2O3 and related materials
- Advanced Semiconductor Detectors and Materials
- 2D Materials and Applications
- Nanowire Synthesis and Applications
- Semiconductor materials and devices
- Advanced Fiber Optic Sensors
- Advancements in Battery Materials
- Optical Systems and Laser Technology
- Spectroscopy and Laser Applications
- Photonic Crystals and Applications
- Metal Extraction and Bioleaching
- Gas Sensing Nanomaterials and Sensors
- Advanced Optical Sensing Technologies
- Thermal properties of materials
- Infrared Target Detection Methodologies
- Cyclone Separators and Fluid Dynamics
- Plasma Diagnostics and Applications
- Metal and Thin Film Mechanics
- Carbon Nanotubes in Composites
Beijing University of Technology
2016-2025
Yale University
2025
Alibaba Group (China)
2024
Union Hospital
2022-2023
Huazhong University of Science and Technology
2018-2023
Panzhihua University
2007-2023
Jiangsu University
2023
Tsinghua University
2018-2022
Xidian University
2002-2021
Wuhan National Laboratory for Optoelectronics
2020
One of the efficient techniques to enhance sensitivity optical fiber sensor is utilize Vernier effect. However, complex system structure, precisely controlled device fabrication, or expensive materials required for implementing technique creates difficulties practical applications. Here, we propose a highly sensitive strain based on two cascaded Fabry-Perot interferometers and Of interferometers, one sensing other referencing, they are formed by pairs in-fiber reflection mirrors fabricated...
Abstract Metasurfaces offer complete control of optical wavefront at the subwavelength scale, advancing a new class artificial planar optics, including lenses, waveplates, and holograms, with unprecedented merits over conventional components. In particular, ultrathin, flat, compact characteristics metasurfaces facilitate their integration semiconductor devices for development miniaturized multifunctional optoelectronic systems. this work, generation structured light is implemented an...
Graphene GaN-based Schottky ultraviolet detectors are fabricated. The monolayer graphene is grown by chemical vapor deposition. much more transparent than metals, as confirmed the fact that our devices retain their high responsivity up to 360-nm wavelength (corresponding band edge absorption of GaN). Importantly, virtue tunable work function graphene, GaN barrier height can be greatly enlarged. built-in field enhanced, and detector performance improved. current ratio with without...
Graphene-based photodetectors exhibit relatively low spectral absorption and rapid recombination of photogenerated carriers, which can limit their response performance. On the other hand, nanostructured lead sulfide (PbS) demonstrates a wide range from visible to near-infrared light. High-quality evenly distributed PbS nanofilms were synthesized by chemical bath deposition applied graphene-PbS heterostructure photodetector. The creates an inherent electric field that extends lifetime leading...
By virtue of the small active volume around Cu catalyst, graphene is synthesized by fast chemical vapor deposition (CVD) in a cold wall vertical system. Despite being highly polycrystalline, it as conductive and transparent standard can be used light emitting diodes electrodes. 7–10 nm indium tin oxide (ITO) contact layer inserted between p-GaN to enhance hole injection. Devices with forward voltage transparency comparable those using traditional 240 ITO are achieved better ultraviolet...
In most cases, transfer of chemical‐vapor‐deposited 2D materials from metallic foil catalysts onto a target substrate is the necessary step for their promising fundamental studies and applications. Recently, highly efficient nondestructive electrochemical delamination method has been proposed as an alternative to conventional etching method, which alleviates problem cost environment pollution because it eliminates need etch away metals. Here, mechanism bubbling process elucidated by studying...
An optical fiber high-temperature sensor is proposed and demonstrated by use of cascaded Fabry-Perot interferometers based on four in-fiber mirrors fabricated femtosecond laser inscription. The output fringe pattern the device exhibits dominant/highly distinguishable dip wavelength, which helps in unambiguous measurement beyond free spectral range. has excellent thermal stability high temperature up to 1100°C, sensitivity obtained 9.91 pm/°C within range 100°C 400°C, 15.88 400°C...
Abstract Candida albicans ( C. ) is an opportunistic pathogen increasingly causing candidiasis worldwide. This study aims to investigate the pattern of systemic immune responses triggered by with disease associated variation Sap2, identifying novel evasion strategies utilized clinical isolates. Specifically, a in isolates identified at nucleotide position 817 (G T). homozygous causes 273rd amino acid exchange from valine leucine, close proteolytic activation center Sap2. The mutant...
Graphene is an ideal material for wide spectrum detector owing to its special band structure, but low light absorption and fast composite of photogenerated carriers lead a weak response performance. In this paper, we designed unique photoconductive graphene-InGaAs photodetector. The built-in electric field was formed between graphene InGaAs, which can prolong the lifetime improve devices by confining holes. Compared with graphene-Si higher reach 0.54 eV formed. It enables device achieve...
Abstract Poly(vinyl alcohol) ( PVA )/glycerol hydrogel beads were created, using saturated boric acid and calcium chloride solution as the chemical crosslinking agents. The structure properties of /glycerol studied. results indicated that glycerol could improved water absorption rate swelling at equilibrium. Also capillary capacity permeability PVA/glycerol beads. rheological tests showed was able to improve effective density amount total slightly increased upon addition glycerol.
A technique for the in situ growth of patterned graphene by CVD has been achieved directly on insulating substrates at 800 °C. The is catalyzed a Ni–Cu alloy sacrificial layer, which integrates many advantages such as being lithography-free, and almost wrinkle-free, with high repeatability rapid growth. etching method metal layer core this technique, mechanism analyzed. Graphene found to play an important role accelerating speeds. exhibits catalytic activity, thus, high-quality can be...
An optical fiber in-line Fabry-Perot interferometric device is presented for ultrasensitive strain sensing by use of vernier effect. The consists two parallel structured cavities in cascaded connection, formed pairs femtosecond laser inscribed in-fiber reflection mirrors. cavity lengths and their difference can be accurately controlled, which enables an extremely large amplification factor when effect used the sensitivity achieved ~236.32 pm/με. Moreover, temperature cross realized as low...
A method for direct growth of graphene nanowalls (GNWs) on an insulating substrate by plasma enhanced chemical vapor deposition (PECVD) is reported. The effects temperature, power, carbon source concentration, gas ratio and time the quality GNWs are systematically studied. Raman spectrum shows that obtained have a relatively high with D to G peak (I /I ) 0.42. Based optimization GNWs, field-effect transistor (FET) photodetector prepared first time, its photo-response mechanism analyzed....