A5100702755- GaN-based semiconductor devices and materials
- Ga2O3 and related materials
- Ionosphere and magnetosphere dynamics
- Magnetic confinement fusion research
- ZnO doping and properties
- Laser-Plasma Interactions and Diagnostics
- GNSS positioning and interference
- Plasma Diagnostics and Applications
- Solar and Space Plasma Dynamics
- Meteorological Phenomena and Simulations
- Photocathodes and Microchannel Plates
- Metal and Thin Film Mechanics
- Aeolian processes and effects
- Acoustic Wave Resonator Technologies
- Atmospheric chemistry and aerosols
- Nuclear Physics and Applications
- Precipitation Measurement and Analysis
- Advanced Neural Network Applications
- Nanofabrication and Lithography Techniques
- Semiconductor Quantum Structures and Devices
- Atmospheric aerosols and clouds
- Earthquake Detection and Analysis
- Advanced Radiotherapy Techniques
- Image and Signal Denoising Methods
- Geophysics and Gravity Measurements
Illinois Institute of Technology
2024
Hefei Institutes of Physical Science
2021-2022
Chinese Academy of Sciences
2021-2022
Institute of Plasma Physics
2021-2022
Huazhong University of Science and Technology
2018-2021
Wuhan National Laboratory for Optoelectronics
2018-2021
University of Science and Technology of China
2021
State Council of the People's Republic of China
2018
For the first time, an ultrahigh degree of optical polarization (DOP) 81.8% in AlGaN-based deep ultraviolet LED (DUV-LED) operated at 286 nm has been experimentally demonstrated. The very high DOP was obtained by introducing novel moth-eye microstructure fabricated on backside a sapphire substrate. Compared with conventional DUV-LED 64.7%, significant 1.26-fold enhancement obtained. It worth mentioning that accurately measured via self-built full spatial transverse electric (TE) and magnetic...
How to prevent the influence of precipitation’s localized and sudden characteristics is most formidable challenge in quality control (QC) precipitation observations. However, with sufficiently high spatiotemporal resolution observational data, nuanced information can aid us accurately distinguishing between intense, events, anomalies data. China has deployed over 70,000 automatic weather stations (AWSs) that provide surface meteorological This study developed a new method for performing QC...
Abstract AlGaN-based deep ultraviolet (DUV) light-emitting diodes (LEDs) suffer from electron overflow and insufficient hole injection. In this paper, novel DUV LED structures with superlattice deceleration layer (SEDL) is proposed to decelerate the electrons injected active region improve radiative recombination. The effects of several chirped SEDLs on performance LEDs have been studied experimentally numerically. grown by metal-organic chemical vapor deposition (MOCVD) fabricated into 762...
AlGaInP-based light-emitting diodes (LEDs) suffer from a low external quantum efficiency (EQE), which is mainly restrained by the poor light extraction efficiency. Here, we demonstrate vertical miniaturized-LEDs (mini-LEDs) with porous n-AlGaInP surface using wet etching process to boost extraction. We investigated effects of time on morphology surface. found that as prolonged, density pores increases initially and decreases subsequently. In comparison mini-LED smooth surface, mini-LEDs...
In this study, we proposed a novel method to grow high-quality AlN films on sputtered AlN/sapphire substrates by designing an gradient interlayer (GIL-AlN).
Abstract In this work we quantify the representation error of algorithm Estimating Model Parameters from Ionospheric Reverse Engineering (EMPIRE), which estimates global neutral winds and ion drifts given time‐varying plasma densities. SAMI3 (Sami3 is A Ionosphere) serves as background climate model pseudo‐measurements for EMPIRE observation system. This configuration allows data assimilation inputs to be self‐consistent between each other with validation data. The estimated are compared...
Abstract A new multi-band and high-speed endoscope diagnostic for the observation of visible light has been successfully developed on Experimental Advanced Superconducting Tokamak. The mirror with an aperture is designed at head optical system. Based two dichroic mirrors, system divided into three imaging groups different bands, i.e. B (380–500 nm), G (500–580 nm) R (580–750 its focal length 16 mm a relatively large D / f = 1:4. spatial resolution less than 5 near object distance <?CDATA...
Abstract During geomagnetic storms, the capabilities of current climate models in predicting ionospheric behavior are notably limited. A data assimilation tool, Estimating Model Parameters Reverse Engineering (EMPIRE), implements a Kalman filter to ingest electric density rate correcting background potential and neutral wind. For baseline setup, or case (1), EMPIRE ingests electron global map output from Ionospheric Data Assimilation 4‐Dimensional (IDA4D) algorithm. In this work, new...
Abstract In order to study the ELMs filamentary structure generated by plasma in H-mode, a tangential visible camera system was established on EAST Tokamak. However, obtained cannot be accurately and quickly identified, which is not conducive of structure. this paper, preliminarily extracted background subtraction method. The modeling method adopts multi-frame averaging followed contrast stretching image. Although can clearly seen image, there exists lot noise, so further extraction needed....
In this work, a novel structure of InGaN‐based blue light‐emitting diodes (LEDs) using super‐lattice as the last quantum barrier (QB) in active region is proposed to improve LEDs performance. The optical power and external efficiency (EQE) are investigated by both simulation experiment. QB can significantly enhance effective electrons from 463 576 meV conduction band thus block leakage electrons. It found that such also facilitate hole injection due reduced height 293 261 valance band....
During extreme ionospheric storms, plasma behaves very differently than current physics models predict, such as by forming a nighttime localized enhancement (NILE). Aiming to decrease the gap between real measurements and background model estimation, we propose using data assimilation tool: Estimating Model Parameters Reverse Engineering (EMPIRE) with Kalman filter implementation ingest ion drift enable estimation of electric potential neutral winds. In this preliminary work, show results...
The Nighttime Ionospheric Localized Enhancement (NILE) is a plasma enhancement sometimes observed in the local nighttime during significant geomagnetic storms, often over Florida. To investigate physical mechanisms that might contribute to this phenomenon, we use Estimating Model Parameters from Reverse Engineering (EMPIRE) algorithm, assimilating ion drift measurements addition density rates, estimate mid-latitude electric potential and drifts associated with it NILE. For study, 17 March...