A5100603528- Terahertz technology and applications
- Photonic and Optical Devices
- Spectroscopy and Laser Applications
- Superconducting and THz Device Technology
- Advanced Chemical Physics Studies
- Orbital Angular Momentum in Optics
- Metamaterials and Metasurfaces Applications
- Radio Astronomy Observations and Technology
- Advanced MEMS and NEMS Technologies
- Mechanical and Optical Resonators
- Fullerene Chemistry and Applications
- Magnetic properties of thin films
- Topological Materials and Phenomena
- Advanced Antenna and Metasurface Technologies
- Ga2O3 and related materials
- GaN-based semiconductor devices and materials
- Graphene research and applications
- Gyrotron and Vacuum Electronics Research
- Acoustic Wave Resonator Technologies
- Boron and Carbon Nanomaterials Research
- Magnetic Properties and Applications
- Atomic and Molecular Physics
- Metallic Glasses and Amorphous Alloys
- Antenna Design and Analysis
- Inorganic Fluorides and Related Compounds
Chinese Academy of Sciences
2017-2024
Shenyang Institute of Automation
2017-2024
University of Chinese Academy of Sciences
2023-2024
Shanghai Jiao Tong University
2019
Max Planck Institute for Polymer Research
2018
University of Electronic Science and Technology of China
2015
Lanzhou University
2009
Xiamen University
1995
Terahertz (THz) frequency metrology has become a topic of increasing interest due to the potential applications for THz radiation. While diversity radiation sources been demonstrated, there are arguably fewer methods which can be used detection radiation, and this limited ability perform spectroscopic measurements in information-rich range. A technique may facilitate wider application accessibility spectroscopy is nonlinear up-conversion fields near-infrared wavelength range, where plethora...
New soft magnetic head materials, the nanocrystalline FeCoAlOC thin films, were prepared by introducing C element in epoxy resin during rf sputtering of FeCoAlO films. When Al2O3 was cosputtered with FeCo, properties films highly improved: coercive force decreases from dozen oersted to several (Hch∼4.8 Oe and Hce∼6.5 Oe). With further addition carbon, exhibit excellent good high frequency response: coercivity is as low 1.0 Oe, saturation Bs>20 kG, permeability μ′>500 when f≤1.0...
In this letter, an ultrathin reflective polarization converter with the total thickness of 1/62 wavelengths is proposed to realize high efficiency cross-polarization conversion at 32 GHz. Two metasurfaces overlapped on same layer a displacement are designed improve its performance, angular stability, and conformal adaptability. Due flexibility polyimide substrate, planar conveniently fabricated by printed circuit board technology. Experimental results show that maximum higher than 94.3%,...
An AlGaN/GaN lateral power diode on Si substrate with recessed Metal/Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> /III-Nitride (MIS) Gated hybrid anode (MG-HAD) for improved forward conduction and reverse blocking has been realized. The low turn-on voltage of 0.6 V good uniformity the fabricated 189 devices is obtained. In comparison conventional device, current at 2 was...
We demonstrate megawatt-level terahertz (THz)-wave generation via a Stokes-seed-injected THz-wave parametric generator and study the cascaded effect. The optical-to-THz conversion efficiency was 1.72 × 10 −3 , peak power conservatively estimated to be 1.09 MW using pulse width of pump. More than 80% energy came from primary generation, with rest coming high-order amplification. Clear Stokes spots second fourth order were observed, factors affecting process are discussed. effect is beneficial...
In this Letter, we verified, for the first time to best of our knowledge, an efficient cascaded difference frequency generation (DFG) with multi-order red shift. The experiment was performed homemade organic crystals pumped by optical parametric oscillator. characteristics energy conversion during DFG were investigated comprehensively at different frequencies and crystal thicknesses. Theoretical explanations provided, based on coupled-wave equations. calculations predicted that cascading...
A configuration for an optical pumped monochromatic terahertz (THz) source operating in a high repetition rate is developed and based on resonant parametric process within Fabry–Perot microcavity. Comprehensive analysis of the spectral selection, cavity phase matching, energy-conversion dynamic, input–output characteristics provided. Calculations are performed Tm3+-doped fiber laser GaAs sheet. It indicated that pump threshold can be scaled down by injection seeding signal wave. Efficient...
A self‐aligned fabrication method is employed for microscale hemispherical shell resonator with integrated diamond electrodes on a silicon (Si) substrate. The millimetre‐scale three‐dimensional (3D) resonator, electrostatic excitation and capacitive detection transducers full control of the fabricated Si substrate by employing microelectromechanical systems process. eight evenly distributed outside are using method, which ensures uniform gap along whole circumference. Boron‐doped...
In the present letter, a vortex phase imaging method is proposed to improve lateral resolution of millimeter-wave (MMW) focal plane system. For efficient transmission beams carrying different orbital angular momentum (OAM), spiral plates processed by 3-D printing technology are designed be loaded onto front horn antenna. Then, reflection spectra object analyzed for discussion. A specific OAM mode more azimuth information found dominant under incidence, and sharper image can theoretically...
This paper investigates a new vortex wave imaging approach to improve the quality of small metal targets size less than 1.5 mm. Antennas with different spiral phase plates are designed efficiently transmit beams orbital angular momentums (OAMs). By analyzing OAM spectrum target, it was discovered that predominant reflection contains particular mode carries abundant azimuthal information. can be explained by selectivity target and guidance transmitting beam. A simple system capture...
This paper presents the design, simulation and measurement results of a novel 0.17-0.22 THz sub-harmonic mixer (SHM). The SHM is based on low parasitic pair antiparallel planar Schottky diodes which fabricated suspended quartz-based substrate circuits with high pass filter, filter IF filter. this are match well. In frequency range 0.17-0.22THz, SHM's conversion loss from 9.06 dB to 11.55dB.