Results 101 to 110 of about 1,179 (209)

Next-Generation Programmable Holographic Metasurface Antenna

2025 Photonics & Electromagnetics Research Symposium - Spring (PIERS-Spring)
Dynamic metasurface antennas and holographic surfaces have opened new frontiers in fields of next generation reconfigurable wireless communications, meta-sensing, computational imaging, and computational optics. A critical component of these advanced systems lies in the engineering of meta-elements that efficiently manipulate electromagnetic waves ...
Jabbar, Abdul, Elsayed, Mostafa, Ur-Rehman, Masood, Imran, Muhammad Ali, Larijani, Hadi, Abbasi, Qammer, Usman, Muhammad   +6 more
openaire   +2 more sources

Spatiotemporal Computational Meta‐Imager for Broadband Dual‐Layer Optical Convolution

Advanced Science, EarlyView.
A single‐layer polarization‐multiplexed meta‐imager achieves factorized dual‐layer broadband convolution via spatiotemporal kernel decomposition. Fixed Bessel‐vortex bases and time‐sequential liquid‐crystal modulation deliver tunable signed weights and in‐situ fabrication‐error compensation. Experiments verify improved classification performance across
Mengguang Wang, Chenglong Zheng, Huaping Zang, Changwei Zhang, Huai Xia, Chang Wang, Zhenrong Zheng   +6 more
wiley   +1 more source

Photo‐Induced Stepwise Liquid Crystal Phase Transition Enabled by Hydrazone Photoswitch

Advanced Science, EarlyView.
A judiciously designed bistable hydrazone photoswitch enables a photo‐induced stepwise “order‐disorder” phase transition in liquid crystals. The linear‐to‐bent isomerization disrupts molecular packing, allowing precise tuning of phase transition temperatures.
Shijie Liu, Yuxin Zhou, Junwen Chen, Yexin Wang, Yiqiu Lv, Panjie Wang, Wenqi Yu, Gege Meng, Jiayi Yu, Chunhua Lin, Guo‐Hua Hu, Ruochen Lan   +11 more
wiley   +1 more source

Holographic communication using programmable coding metasurface

Nanophotonics
Abstract With rapid development of holography, metasurface‐based holographic communication scheme shows great potential in development of adaptive electromagnetic function. However, conventional passive metasurfaces are severely limited by poor reconfigurability, which makes it difficult to achieve wavefront manipulations in real time.
Fan Zhang, Chaohui Wang, Weike Feng, Tong Liu, Zhengjie Wang, Yanzhao Wang, Mingzhao Wang, He‐Xiu Xu   +7 more
openaire   +3 more sources

Adaptive Active Illumination Via Translationally and Axially Tunable Cascaded Metasurfaces

Advanced Science, EarlyView.
Active three‐dimensional sensing faces a fundamental trade‐off between seeing farther and covering more of the scene. Translationally and axially tunable cascaded metasurfaces overcome this limitation by continuously adapting beam direction and illumination coverage.
Chi Zhang, Jianing Yang, Lingyun Zhang, Jingyu Bao, Bingbai Li, Qingsong Feng, Rui You, Xiaoli Jing, Fei Xing, Xiaoguang Zhao, Zheng You   +10 more
wiley   +1 more source

Non‐Uniform Space‐Time‐Coding Modulation for Low‐Complexity Diagnostics of Reconfigurable Intelligent Surfaces

Advanced Electronic Materials, EarlyView.
A diagnostic method for reconfigurable intelligent surfaces (RIS) based on non‐uniform space‐time‐coding modulation is presented. Fault localization is achieved via amplitude‐only spectral measurements, eliminating the need for complex signal processing. A one‐to‐one mapping between harmonic components and RIS elements enables accurate detection.
Xiao Qing Chen, Lei Zhang, Yi Ning Zheng, Bing Bing Zhu, Marco Rossi, Giuseppe Castaldi, Shuo Liu, Vincenzo Galdi, Tie Jun Cui   +8 more
wiley   +1 more source

Broadband Achromatic Programmable Electromagnetic Camouflage via Fluidic‐Accessible Metasurface

Advanced Science
Broadband and reconfigurable illusion camouflage remains a major challenge in electromagnetic wave manipulation, as it imposes concurrent demands for precise dispersion control together with reliable real‐time switching across wide frequency ranges ...
Shipeng Liu, Jiahao Zhang, Jiale Wang, Zeyao Chen, Zhaotong Yu, Jinhong Luo, Jiabao Luo, Rujia Cao, Shuxi Gong, Qingxin Guo, Ping Li, Rujiang Li, Ke Chen, Yongtao Jia, Ying Liu   +14 more
doaj   +1 more source

A General and Efficient Framework for the Rapid Design of Miniaturized, Wideband, and High‐Bit RIS

Advanced Electronic Materials, EarlyView.
A general and efficient framework is proposed for the rapid design of high‐performance reconfigurable intelligent surfaces (RISs). This framework integrates advanced antenna design techniques and incorporates various load types, quantities, and values to achieve the design of high‐performance RISs.
Jun Wei Zhang, Zheng Xing Wang, Wanwan Cao, Zhen Jie Qi, Li Jie Wu, Han Qing Yang, Qun Yan Zhou, Si Ran Wang, Hui Dong Li, Jun Yan Dai, Jiang Luo, Jun Wei Wu, Jia Nan Zhang, Zhen Zhang, Qiang Cheng   +14 more
wiley   +1 more source

Amplifier‐Based Programmable Metasurface for Bidirectional Full Polarization Enhancement

Small Structures
Electromagnetic waves emitted by a transmitter in practical scenarios are often degraded by obstacles along the transmission path, polarization mismatch, and distance to the receiver, which significantly limits the quality of wireless communication.
Xin Wang, Jia Qi Han, Kun Yi Zhang, De Xiao Xia, Hai Xia Liu, Long Li   +5 more
doaj   +1 more source

Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective

Advanced Electronic Materials, EarlyView.
Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe, Ivan Iudice, Giuseppe Castaldi, Marco Di Renzo, Vincenzo Galdi   +4 more
wiley   +1 more source