A5100462490- Laser-Plasma Interactions and Diagnostics
- Photonic and Optical Devices
- Laser-Matter Interactions and Applications
- Semiconductor Lasers and Optical Devices
- Terahertz technology and applications
- Laser-induced spectroscopy and plasma
- Gyrotron and Vacuum Electronics Research
- Advanced Fiber Laser Technologies
- Magnetic confinement fusion research
- Advanced X-ray Imaging Techniques
- Laser Design and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Ionosphere and magnetosphere dynamics
- Semiconductor Quantum Structures and Devices
- Electrochemical sensors and biosensors
- Aluminum Alloy Microstructure Properties
- Spectroscopy and Laser Applications
- Quantum, superfluid, helium dynamics
- Optical Coatings and Gratings
- Optical Network Technologies
- Conducting polymers and applications
- Orbital Angular Momentum in Optics
- Superconducting and THz Device Technology
- Advanced Photonic Communication Systems
- Nonlinear Photonic Systems
University of Electronic Science and Technology of China
2025
Anhui Agricultural University
2024
Northwest Normal University
2015-2024
Institute of Plasma Physics
2024
Shanghai Jiao Tong University
2014-2024
Huazhong University of Science and Technology
2011-2024
Nanjing University of Aeronautics and Astronautics
2022-2023
National University of Defense Technology
2017-2023
Institute of Disaster Prevention
2023
Lanzhou University of Technology
2022
We report on the laser pulse output of 339 J centered at 800 nm from a chirped-pulse amplification (CPA) Ti:sapphire system Shanghai Superintense Ultrafast Laser Facility. The experimental results demonstrated that parasitic lasing as well transverse amplified spontaneous emission homemade 235-mm-diameter final amplifier were suppressed successfully via temporal dual-pulse pumped scheme and index-matching liquid cladding technique. maximum pump-to-signal conversion efficiency 32.1% was...
A needle of strong longitudinally polarized field with homogeneous intensity along the optical axis, long depth focus, and subdiffraction beam size can be generated by focusing a radially light high-NA lens diffractive element (DOE) belts. method combining global-search-optimization algorithm tight properties is proposed to design DOE. Based on properties, incident divided into two parts: areas B. We discover that longitudinal in focal region mainly dependent number belts area B but not total
Abstract The J-TEXT capability is enhanced compared to two years ago with several upgrades of its diagnostics and the increase electron cyclotron resonance heating (ECRH) power 1 MW. With application wave (ECW), ECW assisted plasma startup achieved; tearing mode suppressed; toroidal injection 300 kW drives around 24 kA current; fast electrons are generated injected runaway current conversion efficiency increases ECRH power. coupling between 2/1 3/1 modes extensively studied. coupled usually...
In this paper, a wideband antenna was designed for super-wideband (SWB) applications. The proposed fed with rectangular tapered microstrip feed line, which operated over SWB frequency range (1.42 GHz to 50 GHz). implemented at compact size electrical dimensions of 0.16 λ × 0.27 0.0047 mm3, where respect the lowest resonance frequency. prototype fabricated on F4B substrate, had permittivity 2.65 and 1 mm thickness. exhibited an impedance bandwidth 189% ratio 35.2:1. Additionally, design three...
The domain decomposition method (DDM) enables efficient simulation of electromagnetic problems in large‐scale array antennas using full‐wave methods on moderate hardware. This paper introduces and compares two nonoverlapping DDMs serving as preconditioners with outstanding efficiency. first targets finite periodic by transforming a single unit rather than explicitly modeling the entire array, effectively leveraging repetitive structures to significantly reduce memory usage computation time....
Iodine in buffer gases of air and N<sub>2</sub>was measured under various conditions including different wavelengths, laser powers, pulse widths pressures to compare the detection characteristics low pressure short LIBS.
Based on a pair of coupled 2D nonlinear Schrödinger equations, the collapse dynamics vector field with hybrid states polarization (SoP) in Kerr medium is demonstrated. The critical power for an optical to present, and full vectorial numerical simulations provide detailed information about evolution partial medium. Our results reveal that prefers linearly-polarization, as result self-focusing effect difference linearly, elliptically circularly polarized components. SoP cross-section changes...
The realization and detection of various phase transitions in interacting two-leg bosonic flux ladders are at the frontier present theoretical experimental research condensed-matter physics. We develop a biased Bose-Hubbard ladder model first achieve ground states transition conditions this system by mean-field approach variational analysis. Rich phases revealed, including two different kinds plane-wave phase, i.e., plane wave I (characterized with one single energy minimum band) II...
We demonstrate an efficient method to design the diffractive phase element for modulating electric field at out-of-focus plane of a lens system by using equivalent Fresnel diffraction in free space. In monochromatic illumination, we show example certify validity our experimentally. nonmonochromatic theoretically display that spectral beam splitting and highly confined intensity can be obtained simultaneously plane, which has potential solar concentrating optical encryption.
Transmission X-ray microscopy (TXM) is a powerful, nondestructive and three-dimensional imaging tool that has been applied in many fields. However, the ability to image large size samples using high-resolution TXM restricted due limited depth of focus (DOF). In this study, method based on multiple reconstructed slice stacks an extended sample at different focal positions developed extend DOF TXM. The simulation experimental results demonstrate novel effectively reliably
This paper investigates the cooperative anti-jamming distributed channel selection problem in UAV communication networks. Considering existence of malicious jamming and co-channel interference, we design an interference-aware scheme for purpose maximizing users’ utilities. Moreover, switching cost cooperation are introduced, which have a great impact on Users group sense interference signal energy to judge whether they influenced by interference. When received is lower than threshold, users...
Nano-CT has been considered as an important technique applied in analyzing inter-structures of nanomaterials and biological cell. However, maximum rotation angle the sample stage is limited by space; meanwhile, scan time exorbitantly large to get enough projections some cases. Therefore, it difficult acquire nano-CT images with high quality using conventional Fourier reconstruction methods based on limited-angle or few-view projections. In this paper, we utilized total variation (TV)...
Abstract In J-TEXT tokamak, fast electron bremsstrahlung diagnostic with 9 chords equipped multi-channel analyzer enables detailed studies of the generation and transport electrons. The spatial profiles energy spectrum electrons have been measured in two ECCD cases either on-axis or off-axis injection, processed by Abel-inversion are consistent calculated power deposition locations. Moreover, it is observed that increases rapidly after turning off ECCD, which may be attributed to...
Terahertz (THz) radiation generated by beating of two Langmuir waves in a warm and collisional plasma is discussed theoretically. The critical angle between the wave-length (wave vector) for generating THz are obtained analytically. Furthermore, maximum energy obtained. We find that angle, wave-length, strongly depend on temperature waves. That is, can be controlled adjusting wave-length.
The emission of trace heavy metals, such as mercury (Hg), from power plants and other industries is a severe environmental problem concerning the public health. laser-induced plasma technique was employed to measure Hg under various conditions, which reveals several merits this method at low pressure. main interferences breakdown spectroscopy (LIBS), include black-body-like itself coexisting molecular atomic emissions, decreased significantly using pressure plasma. Under signal rather clear...
The generation of vortex terahertz (THz) radiation by the interaction a two-color Laguerre–Gaussian (LG) laser with plasmas under an external magnetic field is investigated theoretically and numerically. It found that THz good monoenergetic properties can be generated successfully, orbital angular momentum LG lasers transferred to radiation. In this scheme, not only enhance intensity but also break spatial distribution symmetry With increase in initial plasma density, increases significantly...