A5100716116- Spectroscopy and Laser Applications
- Atmospheric Ozone and Climate
- Laser Design and Applications
- Semiconductor Lasers and Optical Devices
- Semiconductor Quantum Structures and Devices
- Terahertz technology and applications
- Photonic and Optical Devices
- Aerogels and thermal insulation
- Advanced Fiber Laser Technologies
- Atmospheric and Environmental Gas Dynamics
- GaN-based semiconductor devices and materials
- Advanced Semiconductor Detectors and Materials
- Surface Modification and Superhydrophobicity
- Analytical Chemistry and Sensors
- Ga2O3 and related materials
- ZnO doping and properties
- Atmospheric chemistry and aerosols
- Semiconductor materials and devices
- Solid State Laser Technologies
- Gas Sensing Nanomaterials and Sensors
- Photonic Crystal and Fiber Optics
- Strong Light-Matter Interactions
- Quantum Dots Synthesis And Properties
- Mesoporous Materials and Catalysis
- Silicone and Siloxane Chemistry
Institute of Semiconductors
2016-2025
Chinese Academy of Sciences
2015-2024
University of Chinese Academy of Sciences
2017-2024
Beijing Academy of Quantum Information Sciences
2021-2024
National University of Defense Technology
2004-2024
University of Science and Technology of China
2022
Zhejiang Lab
2022
Huazhong University of Science and Technology
2021
Nanjing University
1996-2021
Changchun University of Science and Technology
2019
Emerging fiber aerogels with excellent mechanical properties are considered as promising thermal insulation materials. However, their applications in extreme environments hindered by unsatisfactory high-temperature resulting from severely increased radiative heat transfer. Here, numerical simulations innovatively employed for structural design of aerogels, demonstrating that adding SiC opacifiers to directionally arranged ZrO2 (SZFAs) can substantially reduce conductivity. As expected, SZFAs...
The preparation of novel polymer aerogel materials with enhanced flame-retardancy, superior thermal insulation and mechanical strength is great practical significance in energy-savings fire-prevention for buildings. Herein, we reported the fiber-reinforced polybenzoxazine (PBO) composites flame retardance insulation, which were prepared under room temperature atmospheric pressure, using 4,4′-diaminodiphenlymethane (MDA) benzoxazine monomer as raw material oxalic acid (OA) catalyst. Several...
A free-space communication based on a mid-infrared quantum cascade laser (QCL) is presented. room-temperature continuous-wave distributed-feedback (DFB) QCL combined with detector comprise the basic unit of system. Sinusoidal signals at highest frequency 40 MHz and modulated video carrier 30 were successfully transmitted this experimental setup. Our research has provided proof-of-concept demonstration space optical application QCL. The operation our setup was determined by circuit-limited...
Abstract High-power terahertz (THz) quantum cascade laser, as an emerging THz solid-state radiation source, is attracting attention for numerous applications including medicine, sensing, and communication. However, due to the sub-wavelength confinement of waveguide structure, direct beam brightness upscaling with device area remains elusive several mode competition external optical lens normally used enhance brightness. Here, we propose a metallic photonic crystal resonator phase-engineered...
Dual‐comb spectrometer based on quantum cascade lasers (QCLs) is gaining fast development and revolutionizing the precision measurement with high‐frequency temporal resolutions. In these measurements, high‐bandwidth photodetectors are normally used for signal acquisition processing, which complicates system. QCL well‐known its picosecond gain‐recovery time an intrinsic bandwidth of tens GHz. this work, a compact self‐detecting dual‐comb spectroscopy (DCS) demonstrated dispersion‐engineered,...
Abstract Materials with high‐performance thermal insulation and excellent flame‐resistance are incredibly desirable for energy conservation fire safety. In this study, a novel hybrid nanostructure network polybenzoxazine/silica (PBO/SiO 2 ) aerogels were fabricated through facile in situ co‐polymerization sol‐gel methods ambient pressure drying using benzoxazine (BO) monomers SiO sol as reaction source, N, N‐dimethylformamide (DMF) the solvent hydrochloric acid (HCl) catalyst. The was...
In this letter, we proposed a kind of high-bandwidth directly modulated quantum cascade laser (QCL) at <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\sim 8.5~\mu \text{m}$ </tex-math></inline-formula> by optoelectronic fusion integration technology. Multi-physics collaborative buried heterojunction (BH) QCL with tri-terminal coplanar electrode is monolithically integrated grounded waveguide (GCPW)...
We show a phase-locked array of three quantum cascade lasers with an integrated Talbot cavity at one side the laser array. The coupling scheme is called diffraction coupling. By controlling length to be quarter distance (Zt/4), in-phase mode operation can selected. shows great modal stability under different injection currents, from threshold current full power current. far-field radiation pattern contains lobes, central maximum lobe and two lobes. interval between adjacent lobes about...
A coupled ridge waveguide quantum cascade laser (QCL) array consisting of fifteen elements with parallel integration was presented. In-phase fundamental mode operation in each element is secured by both the index-guided nature and delicate loss management properly designed geometries ridges interspaces. Single-lobe lateral far-field a nearly diffraction limited beam pattern obtained. By incorporating one-dimensional buried distributed feedback grating, in-phase-operating QCL design provides...
Carbon fibre-reinforced carbon aerogel composites (C/CAs) were prepared by using polyacrylonitrile (PAN) and phenolic (PH) precursor fibres as reinforcements, respectively, then impregnated with resorcinol-formaldehyde sol, aging, solvent exchanging, CO2 supercritical drying carbonization at 1000°C. The physical properties, structural morphology mechanical thermal insulation behaviour of the two kinds further compared. Pore structure analysis shows that PH-based C/CAs have a larger specific...
Increasing pollution from industrial wastewater containing oils or organic solvents poses a serious threat to both the environment and human health. Compared complex chemical modifications, bionic aerogels with intrinsic hydrophobic properties exhibit better durability are considered as ideal adsorbents for oil-water separation. However, construction of biomimetic three-dimensional (3D) structures by simple methods is still great challenge. Here, we prepared superhydrophobic lotus leaf-like...
Abstract We demonstrated a scheme of phase-locked terahertz quantum cascade lasers (THz QCLs) array, with single-mode pulse power 108 mW at 13 K. The device utilizes Talbot cavity to achieve phase locking among five ridge first-order buried distributed feedback (DFB) grating, resulting in nearly times amplification the power. Due optimum length depends on wavelength, combination DFB grating leads better than multimode Fabry−Perot (F−P) cavities. facet reflects light back array direction and...
We demonstrate surface emitting distributed feedback (DFB) quantum cascade lasers for very high temperature continuous-wave (cw) operation at λ ∼ 4.6 μm. A second-order DFB grating beneath the waveguide provides efficient vertical outcoupling. cw is reported up to a of 75 °C. Total output power 105 mW obtained with record low threshold current density 0.85 kA/cm2 10 Single-lobed far-field radiation pattern divergence angle about 0.17° × 18.7° achieved. Robust single-mode emission side-mode...