A5101885899- Particle Accelerators and Free-Electron Lasers
- Advanced X-ray Imaging Techniques
- Particle accelerators and beam dynamics
- Superconducting and THz Device Technology
- Quantum and electron transport phenomena
- Structural Health Monitoring Techniques
- Ultrasonics and Acoustic Wave Propagation
- Terahertz technology and applications
- Semiconductor Quantum Structures and Devices
- Semiconductor materials and devices
- Ocular and Laser Science Research
- Photonic and Optical Devices
- Scientific Research and Discoveries
- Spectroscopy and Laser Applications
- Flow Measurement and Analysis
- Radio Frequency Integrated Circuit Design
- Concrete Corrosion and Durability
- Vehicle Noise and Vibration Control
- Gyrotron and Vacuum Electronics Research
- Surface Roughness and Optical Measurements
- Advanced Measurement and Detection Methods
- Real-time simulation and control systems
- Analytical Chemistry and Sensors
- Multiferroics and related materials
- Advanced Electrical Measurement Techniques
Shanghai Advanced Research Institute
2021-2024
Chinese Academy of Sciences
2021-2024
Nanjing University
2014-2022
Purple Mountain Laboratories
2021-2022
Hubei University
2020
Nanjing University of Aeronautics and Astronautics
2017-2018
Fudan University
2008
KTH Royal Institute of Technology
2008
Seagate (United States)
2002-2003
Abstract Traditional self‐powered ultraviolet photodetectors, which are usually designed based on p‐n junction interfacial effects, exhibit low responsivity and specific detectivity because the photogenerated electrons holes cannot be separated effectively. Unlike wide band‐gap semiconductor materials, ferroelectrics have large remnant polarization thus high depolarization electric field throughout whole bulk region, can cause effective separation of holes. Based this, in this study, we...
During practical applications, the time-varying service conditions usually lead to difficulties in properly interpreting structural health monitoring signals. The guided wave–hidden Markov model–based damage evaluation method is a promising approach address uncertainties caused by condition. However, researches that have been performed date are not comprehensive. Most of these research studies did introduce serious factors, such as those exist reality, and hidden model was applied directly...
A novel LC-tank oscillator, where bias noise is decoupled and drain current shaped in order to reduce phase noise, presented. Active devices work a class-C manner, the pulse peaks when oscillator insensitive perturbations. Based on ISF theory, this shape can improve performance. Closed-form 1/f <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> equations are derived compared with those of classic same LC-tank. Simulations agree conclusions...
An RF superconducting quantum interference device (RF SQUID), which is an important bistable system, has attracted much attention for its applications in nonlinear fields. With different potential shapes at 20 mK, we perform detailed research on the relationship between probability of phase particle left well (P <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">L</sub> ) SQUID and external noise intensity (D), provides a method to identify...
For on-line prognosis of fatigue crack propagation with guided wave based structural health morning, uncertainties always exist in the process and monitoring. The particle filtering is demonstrated as a powerful tool to deal these uncertainties. However, most literatures adopt standard sequential importance sampling resampling algorithm, which uses transition probability density function neglects current measurement information. Satisfactory results may be unable achieved if particles are...
A hybrid integrated photodetector consisting of array reach-through avalanche photodiodes and readout circuit chips was developed. The photodiode model with separate layer absorption, charge multiplication are elaborated. This kind is optimized for detection 905 nm radiation in that range achieve excellent parameters – high gain, low noise speed. Next, the design properties a new-type regulated cascode configuration discussed. linear were into by using bonder-leading welding techniques....
The extracted dipulse technique, or pseudorandom sequence method, has been used to determine the dependence of noise upon signal. Four main types echo are identified. A simple model is developed and simulated waveforms substantiate physical interpretation pulse. takes into account most significant eigenmodes obtained from experimental dibit data at different linear densities using a Karhunen–Loeve expansion. calculations agree very well low density up high where supralinear occurs.
In this study, we demonstrate an Nb 5 N 6 terahertz (THz) detector with radio frequency (RF) choke-enhanced dipole antenna structure for 0.3 THz detection. The maximum electric field intensity of 218 V/m is obtained by optimizing the parameters RF choke. Compared to a without choke, that choke improved 2.6 times. antenna-coupled fabricated and characterized. measured responsivity 1100 V/W at 0.308 THz, corresponding noise equivalent power (NEP) 6.4 × 10 –12 W/Hz 1/2 . response time as low...
In recent decades, high-gain free-electron lasers (FELs) based on linear accelerators has been successfully developed around the world. Advanced beam diagnostics and feedback technology is one of key factors to further improve performance facilities. Both position deviation trajectory tilt can weaken interaction between electron photon in undulator, seriously affect FEL radiation performance. Existing measurement methods are not sufficient achieve accurate compact undulator segments. Based...
A FFT-filtering-IFFT technique, based on magnetic force microscopy (MFM) image analysis, has been employed to extract and then analyze the perpendicular media noise its characteristics at various linear densities. The experimental results from examined indicate that predominant high recording density originate a cluster formation coarsening process, suggesting one of present difficulties for achieving in scheme resides head/media writeability issues.
A hybrid antenna coupled Nb<sub>5</sub>N<sub>6</sub> microbolometer was demonstrated for dual polarization terahertz (THz)THz detection. By adding a ring resonant (RRA) in another vertical direction and optimizing the structure of antenna, electric field intensity at center maximized both horizontal directions, corresponding 0.193 <italic>THz</italic> were 60 <italic>V/m</italic> 65 <italic>V/m</italic>,respectively. The THz detector prepared. measurement results verify characteristics...