A5101573848- Optical Coatings and Gratings
- Laser Material Processing Techniques
- Surface Roughness and Optical Measurements
- Advanced Surface Polishing Techniques
- Diamond and Carbon-based Materials Research
- Laser-induced spectroscopy and plasma
- Photonic Crystals and Applications
- Metal and Thin Film Mechanics
- Optical Systems and Laser Technology
- Photonic and Optical Devices
- Solid State Laser Technologies
- Semiconductor materials and devices
- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Ion-surface interactions and analysis
- Diverse Aspects of Tourism Research
- Semiconductor materials and interfaces
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Measurement and Metrology Techniques
- ZnO doping and properties
- GaN-based semiconductor devices and materials
- Adhesion, Friction, and Surface Interactions
- Digital Marketing and Social Media
- Advanced Fiber Optic Sensors
- Near-Field Optical Microscopy
Shanghai Institute of Optics and Fine Mechanics
2016-2025
East China Jiaotong University
2020-2025
Nanchang Institute of Science & Technology
2022-2025
Chinese Academy of Sciences
2014-2023
University of Chinese Academy of Sciences
2014-2023
Civil Aviation Administration of China
2023
University of Science and Technology of China
2023
Nanchang Institute of Technology
2023
Center for Excellence in Education
2023
Henan Normal University
2023
Abstract The laser-induced damage threshold (LIDT) of plate laser beam splitter (PLBS) coatings is closely related to the subsurface absorption defects substrate. Herein, a two-step deposition temperature method proposed understand effect substrate impurity on LIDT PLBS coatings. Firstly, BK7 substrates are heat-treated at three different temperatures. surface morphology and defect distribution before after heat treatment compared. Then, coating consisting alternating HfO 2 –Al O 3 mixture...
We report on an 800 nm center-wavelength metal/multilayer-dielectric grating (MMDG) with broadband, high diffraction efficiency. The trapezoidal ridge consists of HfO2 layer sandwiched between two SiO2 films. Combining the advantages and HfO2, reduces difficulties attainment. For such a configuration, high-performance MMDG can be successfully fabricated using existing technology. Experimentally we demonstrated 163 bandwidth -1st-order efficiency greater than 90%. achieved performance as...
Ultralow-absorption laser films have critical applications in high-power continuous-laser and gravitational-wave-detection systems. During film deposition, the ionic oxygen concentration significantly affects absorption loss of film. In this study, Ta2O5 monolayers were deposited using an ion-assisted electron beam evaporation technique, weak at 1064 nm, temperature rise, optical band gap, element content, binding energy tested analyzed. The structure microdefects characterized, their...
From the perspective of empathy theory, this study focuses on process entrepreneurship education to explore mechanism between teacher-student empathic relationship and psychological connection. Entrepreneurship aims provide talent support innovative development society. Previous studies have focused educational significance promoting entrepreneurial intention, few paid attention differentiation caused by incomprehension teachers students. By conducting three experiments cognitive shaping...
A normal-incidence nonpolarizing guided-mode resonance filter is designed. There are two waveguide layers and one grating layer in the filter. By adjusting distance between layers, same wavelength for both TE TM polarization can be achieved. An antireflection design method also used to decrease sideband reflection of The results show that has high reflection, more than 99.9% at 500 nm, FWHMs TE- TM-polarized light 2.16 0.15 respectively.
A reliable method, combining a wet etch process and real-time damage event imaging during raster scan laser test, has been developed to directly determine the most dangerous precursor inducing low-density at 355 nm in fused silica. It is revealed that ~16% of sites were initiated place scratches, ~49% digs, ~35% invisible defects. The morphologies scratches digs compared with those moderate ones. found local sharp variation edge, twist, or inside subsurface defect precursor.
355 nm high-reflective multilayer coatings with or without coevaporated interfaces (CEIs) were prepared by electron beam evaporation under the same deposition condition. Their transmission spectra, surface roughness, and mechanical stress properties evaluated. Elemental composition analysis of was performed using x-ray photoelectron spectroscopy, laser-induced damage thresholds obtained in both 1-on-1 300-on-1 testing modes. The CEIs reveal a lower higher laser resistance when irradiated...
In this paper, a simple active-model-based control scheme is developed for the quadrotor slung load (QSL) system. The works to improve rejection of influences caused by abruptly changed as complementary enhancement while maintaining structure and parameters original controller. A linearized model first constructed with respect hovering state quadrotor. Modeling error then introduced describe uncertainties change simplified model. modeling actively estimated Kalman filter (KF), estimation...
On the basis of Boltzmann equation, authors propose a model that includes scattering from both film surfaces and grain boundaries, have studied quasiclassical electrical transport in metallic films. The in-plane electric conductivity films is obtained, theoretical results are shown to be good agreement with experimental data. We also give relation between temperature coefficient resistivity thickness make comparison experiment.
We report the periodic concentric surface structures on SiO2 layer induced by a single shot nanosecond laser pulse at 1.06 μm. The fringe period of ranges from 7.0 μm to 26.8 μm, depending fluence and distance central defect precursor. size depth damage sites increase almost linearly with 19.6 J/cm(2) 61 J/cm(2). Plasma flash was clearly observed during process. attribute formation mechanism interference between reflected radiations air/shock-front shock-front/film interfaces.
With the development of modern technologies, museums have been engaged in competition for novel sensory resources. Taking into consideration main body visitors, their experiential representation has gradually become focal point museums. However, at present, museum display is limited to visual effect. The scientific and technological methods proposed by existing research not really formed a deep cultural memory historical stories, sustainable paths need be further optimized. Thus, purpose...
The laser damage resistance of coatings in high-power systems depends significantly on the surface quality substrate. In our experiment, pits were precisely fabricated fused silica substrate using a femtosecond processing bench. HfO2/SiO2 high-reflective at 1064 nm deposited by conventional e-beam evaporation onto substrates with and without pits, respectively. internal crack that was induced geometrical structure first observed experiment. laser-induced threshold test showed negative...
This paper studies the modeling and control of a quadrotor with suspended load. It is shown that excessive load swing part system dynamics, which may degrade performance. A detailed analysis about effect carried out based on Newton-Euler Euler-Lagrange method. framework for sliding mode slung then developed. The simulation results show excellent