A5035632462- Adaptive optics and wavefront sensing
- Advanced optical system design
- Liquid Crystal Research Advancements
- Optical measurement and interference techniques
- Optical Systems and Laser Technology
- Photonic Crystals and Applications
- Advanced Optical Imaging Technologies
- Optical Coatings and Gratings
- Metamaterials and Metasurfaces Applications
- Laser Material Processing Techniques
- Photonic and Optical Devices
- Optical Coherence Tomography Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Photorefractive and Nonlinear Optics
- Optical Polarization and Ellipsometry
- Advanced Antenna and Metasurface Technologies
- Optical Wireless Communication Technologies
- Semiconductor Lasers and Optical Devices
- Surface Roughness and Optical Measurements
- Solid State Laser Technologies
- Plasmonic and Surface Plasmon Research
- Ocular and Laser Science Research
- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Thin-Film Transistor Technologies
Suzhou University of Science and Technology
2019-2025
Chengdu University of Information Technology
2024
Changchun Institute of Optics, Fine Mechanics and Physics
2010-2020
Chinese Academy of Sciences
2010-2020
Institute of High Energy Physics
2002-2019
University of Chinese Academy of Sciences
2007-2018
Institute of Soil Science
2017
Tokyo Institute of Technology
2010
RIKEN
2010
Seoul National University
2010
The performance of free-space optics communication (FSOC) is greatly degraded by atmospheric turbulence. Adaptive (AO) an effective method for attenuating the influence. In this paper, influence spatial and temporal characteristics turbulence on AO in a FSOC system investigated. Based Greenwood frequency (GF) ratio receiver aperture diameter to coherent length (D/r 0 ), relationship between (CE) parameters (corrected Zernike modes number bandwidth) derived first time. Then, simulations...
Ultrafast all-optical switches based on epsilon-near-zero (ENZ)-enhanced nonlinear refraction in transparent conducting oxides have achieved exciting results realizing large absolute modulations. However, broad-band, polarization-independent, and wide-angle ultrafast been challenging to produce, due the inherent narrow band, polarization-dependent, angle-dependent characteristics of ENZ effect. To this end, we propose an switch enhanced absorption corrugated indium tin oxide (ITO) thin...
We introduce a novel parallel-aligned liquid-crystal (LC) spatial light modulator (SLM) that has been designed to operate in phase-only mode for wave-front correction. measured and analyzed theoretically the electro-optic characteristics of LC SLM obtained peak-to-valley value 0.07049lambda(lambda= 0.6328microm) after A Strehl ratio 0.989 indicates approximate upper limit an aberrated wave front can correct when it is used adaptive optical system.
Abstract In the current solution for multiwavelength achromatic flat lenses, a one-to-one correspondence exists between number of writing phase distributions and wavelengths. Breaking this requires complex design parameter optimization. Here, we show that dual-layer cascade liquid crystal Pancharatnam-Berry lens (CLCPBL) with two specific coupled distribution layers can achieve three wavelength achromaticity without any optimization process. Similarly, in three-layer cascade, wavelengths...
We illustrate that the phase-only liquid crystal spatial light modulator (LC SLM) can be used for optical testing. The large phase change and modulation precision are discussed. computer generated holograms (CGH) method is to acquire significant modulation. And modulating characteristics of LC SLM measured. It shows depth more than 2pi down 1/14lambda (PV) 1/100lambda (rms) (lambda=632.8nm). In order verify this method, former surface a convex lens tested by ZYGO interferometer. parallel...
Used as a wavefront corrector, liquid crystal spatial modulator (LC-SLM) has good repeatability and linearity, which are essential for open-loop adaptive optics, the optical system can increase light energy efficiency by factor of two LC-SLM improve bandwidth. In order to test performance in correction, an indoor closed-loop configuration is constructed on control method. With this method, it demonstrated that residual error after correction could be smaller than 0.08lambda (RMS: root mean...
Abstract We demonstrated flower-like 3D Ag-Au hetero-nanostructures on an indium tin oxide glass (ITO glass) for surface enhanced Raman scattering (SERS) applications. The Ag nanostructures were obtained through electrodeposition with liquid crystalline soft template which is simple, controllable and cost effective. further fabricated by galvanic replacement reaction of gold (III) chloride trihydrate (HAuCl 4 ·3H 2 O) solution Ag. hetero-nanostructure exhibited stronger SERS effects better...
Electrically tunable distributed feedback (DFB) laser emission from a dye-doped holographic polymer dispersed liquid crystal (HPDLC) transmission grating is demonstrated. The homogenously aligned (LC) in this scaffolding morphologic enables large refractive index (RI) change for the TM wave under applied electric field, which turn leads to red-shift of 8 nm output emission. tuning behavior DFB well explained on basis waveguide theory and amount phase-separated LCs.
The core problem of phase diversity retrieval (PDPR) is to find suitable optimization algorithms for wave-front sensing different scales, especially large-scale wavefront sensing. When dealing with sensing, existing gradient-based local used in PDPR are easily trapped minimums near initial positions, and available global possess low convergence efficiency. We construct a practicable algorithm This algorithm, named EPSO-BFGS, two-step hybrid based on the combination evolutionary particle...
Adaptive optics systems often work in a closed-loop configuration due to the hysteretic and nonlinearity properties of conventional deformable mirrors. Because high-precision wavefront generation nonhysteretic liquid-crystal devices, open-loop control becomes possible. Open-loop is requirement for advanced adaptive concepts. We designed an system with liquid-crystal-on-silicon corrector. This simple, fast, can save much more light compared liquid-crystal-based systems. The detailed...
In the application of a nematic liquid-crystal (LC) spatial light modulator, we derived formula retardation dynamic response device by solving Erickson–Leslie equation. Then, time 2πphase change can be expressed as function LC cell gap. The theoretical and experimental results all indicate that 2π first decreases then increases with gap increasing, there is an optimal to obtain shortest time. Therefore, method optimizing shows potential improve switching frequency for type optical specific...
A nematic liquid crystal adaptive optics system (NLC AOS) was assembled for a 2.16-m telescope to correct atmospheric turbulence. LC AOS designed and optimized with Zemax optical software. Second, an correction experiment performed in the laboratory test performance of NLC AOS. After correction, peak valley (PV) root mean square (RMS) wavefront were down 0.2 lambda (lambda=633 nm) 0.05 lambda, respectively. Finally, star Pollux (beta Gem) tracked using Reflecting Telescope, real time...
In the paper, a method to calculate time evolution turbulence wavefronts based on covariance is theoretically presented in detail. According it, time-evolution disturbed by atmospheric were experimentally generated our LC simulator (ATS) liquid crystal silicon (LCOS) with high pixel density, and measured wavefront sensor. The advantage of such ATS over conventional one that it flexible considering weather parameters wind speed C(n) (2), relatively easy control.
In adaptive optics system (AOS) for optical telescopes, the reported wavefront sensing strategy consists of two parts: a specific sensor tip-tilt (TT) detection and another other distortions detection. Thus, part incident light has to be used TT detection, which decreases energy by eventually reduces precision correction. this paper, single Shack-Hartmann based measurement method is presented both large amplitude distortions' measurement. Experiments were performed testing validating...
Abstract Large-scale controllable fabrication of highly roughened flower-like silver nanostructures is demonstrated experimentally via electrodeposition in the liquid crystalline phase. Different sizes flowers are fabricated by adjusting deposition time and concentration nitrate solution. The density sample also this work. can serve as effective surface-enhanced Raman scattering fluorescence substrates because their local surface plasmon resonance they may have applications photoluminescence...