A5019710888- Laser-induced spectroscopy and plasma
- Mass Spectrometry Techniques and Applications
- Perovskite Materials and Applications
- Advanced Fiber Laser Technologies
- Analytical chemistry methods development
- Particle physics theoretical and experimental studies
- Conducting polymers and applications
- Quantum Chromodynamics and Particle Interactions
- Seismic Imaging and Inversion Techniques
- Photonic and Optical Devices
- Thin-Film Transistor Technologies
- Semiconductor materials and devices
- High-Energy Particle Collisions Research
- Geophysical Methods and Applications
- Chalcogenide Semiconductor Thin Films
- Seismic Waves and Analysis
- Black Holes and Theoretical Physics
- Laser-Matter Interactions and Applications
- Electromagnetic Scattering and Analysis
- Geoscience and Mining Technology
- Atomic and Molecular Physics
- Microwave Imaging and Scattering Analysis
- Spectroscopy and Laser Applications
- Photorefractive and Nonlinear Optics
- Advanced Photonic Communication Systems
Nanchang University
2024
Beijing Technology and Business University
2023-2024
University of Arizona
2018-2024
Hubei Normal University
2024
Guangdong University of Technology
2024
nLIGHT (United States)
2024
Ministry of Water Resources of the People's Republic of China
2024
China Institute of Water Resources and Hydropower Research
2024
Beijing Institute of Petrochemical Technology
2023
Central South University
2014-2023
Full waveform inversion has been successful in building high resolution velocity models for shallow layers. To be successful, it requires refracted waves or low frequencies the reflection/refraction data. We revisit full theory hopes of relaxing dependence on frequency reflections. implement an approach allowing updating long wavelength components model affecting reflected arrivals even with absence input Our tactic is based a non-linear iterative relaxation where short and are updated...
This Letter reports dual-frequency-comb spectroscopy in the deep ultraviolet used to characterize transient laser-produced plasmas. Dual-comb at these wavelengths enables access a large number of strong electronic transitions neutral and ionized atoms molecules. broadband system 265 nm measures multiple singly iron plasma. Analysis absorption spectra yields time-resolved ion column densities, excitation temperatures, electron which are measured down 10 14 cm −3 levels. The results provide...
Optical frequency division based on bulk or fiber optics provides unprecedented spectral purity for microwave oscillators. To extend the applications of this approach, challenges are to develop miniaturized oscillators without trading off phase noise performance. Here, we report a chip-scale high-performance photonic oscillator integrated electro-optical division. Dual distributed-feedback lasers co-self-injection locked single silicon nitride spiral resonator provide record-high-stability,...
Ice formation next to solid surfaces is important in many biological, materials, and geological phenomena may be a factor how they impact various technologies. We have used sum frequency generation (SFG) spectroscopy study the structure of ice as well freezing melting transition temperatures water contact with sapphire substrates. observed that are function pH surface charge substrate. At low pH, we an increase SFG signal subsequent formation. Contrary expectations, at 9.8, corresponding...
In this article, the thermodynamic properties of Bardeen black holes surrounded by quintessence are investigated in framework a new higher order GUP. The modified Hawking temperature, entropy and heat capacity derived using heuristic approach. Meanwhile, remnant temperature mass deduced, hole state equation is obtained utilizing energy density matter. Ultimately, we analyze effects GUP controlling deformation parameter $\beta$ on these graphical illustrations, to more comprehensively...
We utilize time-resolved dual-comb spectroscopy to measure the temporal evolution of population number densities and absorption excitation temperature Fe in a laser-induced plasma. The spectra three excited-state transitions around 533 nm are simultaneously measured at different time delays following laser ablation stainless steel sample. This Letter probes late-time behaviors plumes during plasma cooling. high spectral resolution broad coverage technique, combined with measurement...
The selective oxidation of 5-hydroxymethylfurfural (HMF) into 2,5-furandicarboxylic acid (FDCA) is an essential reaction to produce a wide variety fine chemicals and polymers. To promote the selectivity product yield, cost-effective catalysts are highly required. Particularly, support-type catalysts, which generally composed specific noble metal particle loaded onto suitable support, well recognized as promising candidates. Herein, ruthenium nanoparticles on Cr-Fe-O support (Ru/Cr-Fe-O)...
We employ a well-confined hydrogen plasma of disk shape both as vacuum ultraviolet (VUV) lamp operating primarily at 121.5 nm and source atomic radicals. Both VUV photons act to dissociate feedstock gases used in low-temperature (<400 °C) metalorganic chemical vapor deposition (MOCVD). Thin films have been deposited with the confined an excimer laser 193 order compare two methods. Preliminary electrical properties via methods indicate superiority assisted MOCVD technique.
Free control of electromagnetic wave fronts remains a key issue in photonics. Traditional wave-shaping elements, used for centuries, suffer from limited functionalities and excessive size. Now metasurfaces offer exotic abilities to reshape the front light, but are mainly manipulate propagating waves. Extending idea waves surface (SWs), authors create gradient metawall that yields focusing effects high-efficiency reflection per generalized Snell's Law SWs. This development may inspire...
Two spatial self-phase modulation (SSPM) patterns were observed in suspensions of Bi2TeSe2 nanosheets. mechanisms found to produce SSPM with different occurrence times and power dependence. The Type I (narrow) rings are attributed the coherent third-order nonlinear optical Kerr effect, which induces self-diffraction 2D materials, II (wide) assigned contribution a thermal effect. refractive index is be 2.30×10-5cm2W-1 at 700 nm. findings described here provide an explanation for formation...
We introduce a new, to the best of our knowledge, modality dual-comb spectroscopy (DCS) that enables simplified and powerful new approach for time-resolved measurements with increased acquisition rates. This “burst mode” form DCS relies on multiplexing each probe pulse into short train pulses. With this we demonstrate series absorption-based spectroscopic laser-induced plasma using only single laser ablation shot identify 22 Nd lines not previously reported in literature. The transmission...
Dual-comb spectroscopy (DCS) represents a novel method of using absorption as diagnostic tool for multispecies analysis excitation temperatures and column densities in laser-produced plasmas (LPPs). DCS was performed on LPP generated by ablating multielement alloy containing Nd, Gd, Fe. Transitions from all three elements were observed spectra measured 530.08 to 535.19 nm at seven time-delays 31 250 μs after ablation. The fit nonlinear regression algorithm determine peak areas, determined...
Abstract Bedload studies at the particle scale may help grasp essence of problem. Existing suffer from short filming durations, limited data volume, and a narrow range sediment transport intensity variations. This paper employs high‐speed photography technology conducts experimental on bedload motion under 8 different intensities. Using latest image processing technology, over 6 million coordinate points nearly 400,000 trajectory curves were automatically obtained used to compare...