Results 91 to 100 of about 9,355,325 (300)

Wavefront-Constrained Passive Obscured Object Detection

Accurately localizing and segmenting obscured objects from faint light patterns beyond the field of view is highly challenging due to multiple scattering and medium-induced perturbations.
Y Ouyang (13686946), T Zhang (5107766), X Zhang (6084905), Huiyu Zhou (20342400), J Liu (805042), X Huang (6099809), Z Huang (11552365), Z Zheng (9892952), S Jiang (8712765), W Tang (2926176)   +9 more
core   +4 more sources

Detection and Anti‐Detection with Microwave‐Infrared Compatible Camouflage Using Asymmetric Composite Metasurface

Advanced Science
Detection and anti‐detection with multispectral camouflage are of pivotal importance, while suffer from significant challenges due to the inherent contradiction between detection and anti‐detection and conflict microwave and infrared (IR) stealth ...
Yanzhao Wang, Huiling Luo, Yanzhang Shao, Hui Wang, Tong Liu, Zhengjie Wang, Kai‐yue Liu, Xiaogang Su, He‐Xiu Xu   +8 more
doaj   +1 more source

Space‐Time Metasurface Antenna Enabled High‐Dimensional Electromagnetic Modulation for Intrinsic Physical Layer Security

Advanced Science, EarlyView.
The concept of high‐dimensional EM modulation using the STMA for physical layer secure communication is illustrated in figure. The STMA consists of a series of programmable unit cells, with 1‐bit reconfigurable phase states (0/π). The STMA is excited by a monochromatic continuous wave (CW) at frequency fc and controlled by a field‐programmable gate ...
Xinyu Fang, Yiqing Sun, Chenfeng Yang, Siran Wang, Zheng Xing Wang, Kaixu Wang, Geng‐Bo Wu   +6 more
wiley   +1 more source

A Review of Wavefront Sensing and Control Based on Data-Driven Methods

Aerospace
Optical systems suffer from wavefront aberrations due to complex atmospheric environments and system component errors, leading to systematic aberrations and significantly degrading optical field quality. Therefore, the detection and correction of optical
Ye Zhang, Qichang An, Min Yang, Lin Ma, Liang Wang   +4 more
doaj   +1 more source

Hierarchical Physical‐Cyber Encryption via Metasurface‐Encoded Holographic Keys

Advanced Science, EarlyView.
ABSTRACT Physical‐layer encryption based on metasurfaces has emerged as a promising alternative to conventional algorithmic cryptography by embedding security into physical processes. However, most existing metasurface‐based encryption schemes operate within single‐stage or static frameworks, where correct physical illumination directly reveals the ...
Zhen Liu, Changhong Dai, Wei Zhu, Ruisheng Yang, Bohan Zhang, Lei Zhang, Bobo Du, Shengxiang Wang, Guangwei Hu   +8 more
wiley   +1 more source

Multichannel full-space coding metasurface with linearly-circularly-polarized wavefront manipulation

Nanophotonics
Achieving independent multitasked wavefront control by using an ultrathin plate is a challenge to increase information capacity in integration optics and radar applications.
Luo Huiling, Gao Huanhuan, Wang Yanzhao, Wang Chaohui, Zhang Fan, Shao Yanzhang, Liu Tong, Wang Zhengjie, Xu He-Xiu   +8 more
doaj   +1 more source

Integrated Wavefront Sensing and Processing Method Utilizing Optical Neural Network

Photonics
Wavefront sensors and processors are vital components of adaptive optical (AO) systems, directly impacting the operating bandwidth. As application scenarios become increasingly complex, AO systems are confronted with more extreme atmospheric turbulence ...
Gang Luo, Yuanchao Geng, Deen Wang, Qiang Yuan, Dongxia Hu, Wanguo Zheng   +5 more
doaj   +1 more source

Wavefront Sensing and Control for JWST

Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2008
The Wavefront Sensing and Controls commission process for the James Webb Space Telescope will be described, and data from supporting experiments will be presented.
openaire   +2 more sources

Red Blood Cells as Endogenous Biotweezers for Optical Micromanipulation In Vivo

Advanced Science, EarlyView.
By synergistically integrating the long‐distance manipulation fiber probe (LDMFP) and endogenous red blood cells (RBCs) as biocompatible optical elements, a natural RBC biotweezer was developed for the desired microparticle manipulation and immune cell activation within living vasculature, which might offer an alternative tool for intravital optical ...
Tong Yang, Xinyu Ren, Dalin Ma, Hao Pang, Wei Chen, Kaize Cai, Mei Yuan, Bingzhi Zhang, Zufang Lin, Xiaoshuai Liu   +9 more
wiley   +1 more source

Single‐Sensor Vibration Sensing in Anisotropic Composites Enabled by Disordered Metasurfaces

Advanced Science, EarlyView.
This work develops a single‐sensor vibration sensing (SSVS) framework that integrates disordered metasurfaces with compressive sensing. Comprehensive numerical and experimental validations demonstrate that, by manipulating anisotropic guided wave propagation through metasurfaces, the proposed SSVS framework enables high‐fidelity multi‐source vibration ...
Jianjie Zhang, Lanhe Xu, Zhongzheng Zhang, Yongbo Li, Eric Li, Asoke K. Nandi, Bing Li   +6 more
wiley   +1 more source