A5115959257- Optical Coatings and Gratings
- Photonic and Optical Devices
- Advancements in Photolithography Techniques
- Photorefractive and Nonlinear Optics
- Additive Manufacturing Materials and Processes
- Indoor and Outdoor Localization Technologies
- Laser Material Processing Techniques
- Electron and X-Ray Spectroscopy Techniques
- Marine and coastal ecosystems
- Metal and Thin Film Mechanics
- Groundwater flow and contamination studies
- Advanced Antenna and Metasurface Technologies
- Advancements in Battery Materials
- Photonic Crystals and Applications
- Liquid Crystal Research Advancements
- Thermal Radiation and Cooling Technologies
- Optical Systems and Laser Technology
- Heavy metals in environment
- Surface Roughness and Optical Measurements
- Manufacturing Process and Optimization
- Optical Polarization and Ellipsometry
- Metamaterials and Metasurfaces Applications
- Underwater Vehicles and Communication Systems
- Surface Modification and Superhydrophobicity
- Additive Manufacturing and 3D Printing Technologies
Nanchang Institute of Technology
2024
Dalian University of Technology
2024
Chinese Academy of Sciences
2007-2023
Aerospace Information Research Institute
2021-2023
University of Chinese Academy of Sciences
2023
Huazhong University of Science and Technology
2012-2023
State Key Laboratory of Transducer Technology
2021-2023
Zhejiang University of Technology
2021
Changchun Institute of Optics, Fine Mechanics and Physics
2007-2020
Northwest University
2016-2018
We propose a depolarizer based on the principle of collection half-wave plates with randomly distributed optic axes. The design is demonstrated by means dynamically photopatterning liquid crystal into aligned homogeneous domains. characterize for 1550 nm and C-band (1520–1610 nm). A degree polarization less than 5% obtained any linearly polarized light. This study provides practical candidate high-performance depolarizers.
Infrared broadband absorbers are in great demand various applications, such as integration into uncooled infrared detectors and microbolometers. In this thesis, we demonstrate compare three different design methods: coupling multi-sized resonators, inlaying metallic structures the dielectric layer choosing laminated layers made of lossless lossy materials. Due to their absorption mechanisms, initially propose a W/ZnTe/W/Ge/W an embedded Ti/Si/Ti absorber, both which can achieve...
Continuous basalt fiber is an emerging high-performance foundational material that can be widely used in fields such as road construction, energy conservation and environmental protection, aerospace, military equipment, marine ships. However, it difficult for existing processing techniques to form continuous architectures with three-dimensional (3D) complex shapes. In addition, the fibers are filled polymers, which cannot fully utilize performance of fibers. Therefore, here, we report...
The hydrodynamic theory is a powerful tool to study the nonlocal effects in metallic nanostructures that are too small obey classical electrodynamics while still large be handled with full quantum-mechanical theory. existing model can give accurate quantitative predictions for plasmonic resonance shifts nanoplasmonics, yet not able predict spectral width which usually taken as pre-set value instead. By taking account fact due electron density spill-out from surface, Coulomb interaction...
We describe a simple method to fabricate blazed gratings used in the extreme ultraviolet wavelength region. The uses an argon and oxygen mixed-gas ion beam directly etch grating substrate through rectangular profile photoresist mask. With this etched groove can be well controlled. An Mo/Si multilayer-coated specimen with blaze angle of 1.9° was fabricated measured. At incident 10° 13.62 nm, diffraction efficiency negative second order reaches 36.2%.
Abstract A metamaterial absorber is proposed that functions in the medium‐ (3–5 µm) and long‐wavelength (8–12 infrared (medium‐wavelength infrared, MWIR, LWIR, respectively) regions. The design, which consists of periodic cells, can be tuned to achieve single‐band or dual‐band light absorption by changing periodicity structure. Each cell forming a bottom metal plate (Al), top disk (Ti), an intermediate dielectric medium (Si ZnS) (Ti) embedded. For period 0.85 µm, achieves broadband LWIR...
Recent reports on the selective laser melting (SLM) process under a vacuum or low ambient pressure have shown fewer defects and better surface quality of as-printed products. Although physical SLM in has been investigated by high-speed imaging, underlying mechanisms governing heat transfer molten flow are still not well understood. Herein, we first developed mesoscopic model variable based our recent laser-welding studies. We simulated transport phenomena 316L stainless steel powders...
An intuitionistic method is proposed to design shadow masks achieve thickness profile control for evaporation coating processes. The based on the concept of matrix, which a matrix that contains coefficients build quantitive relations between shape parameters and quantities substrate directly. By using could be derived simply by solving equation. Verification experiments were performed special case where materials have different condensation characteristics. designed mask pair with...
The dispersion compensation property of octagonal photonic crystal fibers (PCFs) was simulated with multipole method in this paper.It found that the dispersion, slope and Kappa parameter PCFs can be designed precisely but changing air hole size pitch cladding.We compared fiber hexagonal structure structure, both which have same parameters. It easily abtains large negative low non-linear coefficient. demonstrated has huge potential designing diepersion PCFs. So, we a novel PCF structure.The...
Without requiring targets to carry any device, device-free-based tracking is playing an important role in many emerging applications such as smart homes, fitness tracking, intruder detection, etc. While promising, current device-free systems based on inexpensive commercial devices perform well the training environment, but poorly other environments because of different multipath reflections. This paper introduces RDTrack, a system that leverages changes Doppler shifts, which are not...
Device-free localization of people and objects indoors not equipped with radios is playing a critical role in many emerging applications. This paper presents novel channel state information (CSI) pre-processing scheme that enables accurate device-free indoors. The basic idea simple: CSI sensitive to target's location by modelling the measurements multiple wireless links as set power fading based equations, target can be determined. However, due rich multipaths indoor environment, received...
A miniature Fourier transform spectrometer is proposed using a thin-film lithium niobate electro-optical modulator instead of the conventional made by titanium diffusion in niobate. The was fabricated contact lithography process, and its voltage-length optical waveguide loss were 2.26 V·cm 1.01 dB/cm, respectively. Based on wavelength dispersion half-wave voltage modulator, emission spectrum input signal retrieved processing interferogram, analysis experimental data monochromatic light shows...
To address the poor corrosion resistance of titanium matrix composites treatment vessels for nuclear fuel reprocessing in HF solution at room temperature and high concentration HCl/HNO 3 solutions temperature, hierarchical micro‐/nanostructure surfaces with adjustable superhydrophobicity are prepared on Ti6Al4V‐based by laser microengraving followed fluorosilane modification. The effect topography composition surface wettability is investigated. More importantly, anticorrosion mechanism...
Diffraction gratings used in extreme UV are typically coated with periodic multilayer thin films. These coatings have a small bandwidth, thus leading to narrow usable spectral region of gratings. Well-designed aperiodic could provide high reflectivity over much broader wavelength region, so they broaden the We designed and deposited an Mo/Si coating onto blazed grating substrate. At incidence angle 10 degrees, -2nd-order diffraction efficiency is approximately 10% through range 13-16 nm.