Results 131 to 140 of about 22,239 (310)

Multi‐Channel Electrically Tunable Varifocal Metalens With Compact Multilayer Polarization‐Dependent Metasurfaces and Liquid Crystals

Advanced Science, EarlyView.
A compact eight‐channel electrically tunable varifocal metalens with three single‐layer polarization‐multiplexed bi‐focal metalens and three LC cells. The total thickness of the device is ∼6 mm, while the focal lengths can be switched among eight values (3.6, 4.2, 4.5, 4.9, 6.2, 6.9, 8.4, and 9.6 mm). ABSTRACT As an essential module of optical systems,
Zhiyao Ma, Yize Liu, Zhe Li, Tian Tian, Yuxuan Liao, Xue Feng, Yongzhuo Li, Kaiyu Cui, Fang Liu, Hao Sun, Wei Zhang, Yidong Huang   +11 more
wiley   +1 more source

Multibeam by Metasurface Antennas

IEEE Transactions on Antennas and Propagation, 2017
We explore various possibilities for designing multibeam antennas using a single metasurface (MTS) aperture. Both single-source and multisource feeding schemes are considered. For the single-source case, two approaches are investigated. In the first one, the MTS aperture is divided into several angular sectors, each one devoted to the formation of a ...
David Gonzalez-Ovejero, Gabriele Minatti, Goutam Chattopadhyay, Stefano Maci   +3 more
openaire   +3 more sources

Helicity multiplexed broadband metasurface holograms [PDF]

, 2015
Metasurfaces are engineered interfaces that contain a thin layer of plasmonic or dielectric nanostructures capable of manipulating light in a desirable manner.
Xianzhong Chen, Bun Pun, Shuang Zhang, Chen, Shumei, Fuyong Yue, Guixin Li, Li, G, Chen, S, Zheng, G, Cheah, KW, Wong, PWH, Chen, X, Han Wong, Yue Bun Pun, Edwin, Chen, M, Chen, Ming, Pun, Edwin Yue Bun, Pun, EYB, Li, Guixin, Li, King Fai, Kinlong Chan, Wen, Dandan, Zheng, Guoxing, Cheah, Kok Wai, Chen, Xianzhong, Li, KF, Kok Wai Cheah, Polis Wing, An Wen, Chan, K, Zhang, S, Wen, D, Guoxing Zheng, Edwin Yue, Yue, Fuyong, Zhang, Shuang, Chan, Kinlong, Yue, F, Shumei Chen, King Fai Li, Wong, Polis Wing Han, Ming Chen, Li, King-Fai, Chen, Xianzhong; id_orcid   +43 more
core   +1 more source

Concurrent Terahertz Spin Excitations and Phase Shift Control in Fe4Nb2O9: A Material for Synergizing Computation and Communication Technologies

Advanced Science, EarlyView.
A multifunctional terahertz (THz) platform is demonstrated, in a model material Fe4Nb2O9, exhibiting a large intrinsic THz phase shift alongside distinct THz magnon excitations in its antiferromagnetic phase. This coexistence of phase modulation and spin dynamics offers a promising pathway toward integrated THz communication and magnonic computation ...
Brijesh Singh Mehra, Karan Datt Sharma, Sanjeev Kumar, Gaurav Dubey, Mitanshi Gupta, Ravi Shankar Singh, Dibakar Roy Chowdhury, Christine Martin, Antoine Maignan, Kiran Singh, Dhanvir Singh Rana   +10 more
wiley   +1 more source

Nonreciprocal Radiation Pattern Metasurface Transformer

, 2019
This paper presents the concept of nonreciprocal radiation pattern metasurface transformer. The metasurface is placed on top of a source antenna, transforms the radiation pattern of the source antenna, introducing different radiation patterns for ...
Taravati, Sajjad, Ahmadi, Shahrokh, Zaghloul, Mona, Mona Zaghloul, Reza Karimian, Karimian, Reza, Shahrokh Ahmadi, Sajjad Taravati   +7 more
core   +1 more source

Integrated Ultrasonic Platform for Bioelectronic Control through Biological Barriers Based on Metasurface

Advanced Science, EarlyView.
A metasurface‐enabled ultrasonic platform achieves precise multi‐focal control through biological barriers, real‐time physiology‐driven modulation, and simultaneous wireless power and data transmission. By unifying wavefront engineering, closed‐loop feedback, and acoustic communication, this work establishes key enabling technologies toward scalable ...
Chuanxin Zhang, Hanjie Xiao, Xue Jiang, Dean Ta   +3 more
wiley   +1 more source

Longitudinal Multi-Channel Focused Vortex and Vector Beams Generation by Quarter-Wave Plate Meta-Atom Metasurfaces

Nanomaterials
Metasurface-based longitudinal modulation introduces the propagation distance as a new degree of freedom, extending the light modulation with metasurfaces from 2D to 3D space.
Teng Ma, Kaixin Zhao, Manna Gu, Haoyan Zhou, Chunxiang Liu, Chuanfu Cheng, Qingrui Dong, Li Ma   +7 more
doaj   +1 more source

Metasurface‐Enabled Active‐Like Passive Radar

Advanced Science, EarlyView.
A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li, Jiawen Xu, Hanting Zhao, Xu Zhao, Yanjin Chen, Tie Jun Cui, Vincenzo Galdi, Lianlin Li   +7 more
wiley   +1 more source

TRIM: Simultaneous Thermometry, Ranging, and Imaging via a Monolithic Metalens

Advanced Science, EarlyView.
ABSTRACT While metasurfaces offer a pathway beyond the discrete architectures of conventional LWIR systems, physically fusing high‐precision thermometry and passive ranging onto a single metalens remains a formidable challenge. Here, we demonstrate a monolithic, dual‐focus metalens capable of simultaneous multidimensional sensing.
Man Yuan, Yuqing Zhang, Wangzhe Zhou, Zhaojian Zhang, Xiaoyun He, Xinpeng Jiang, Yiyi Li, Xin He, Jiagui Wu, Yuanmu Yang, Junbo Yang   +10 more
wiley   +1 more source

Low-reflection beam refractions by ultrathin Huygens metasurface

AIP Advances, 2015
We propose a Huygens source unit cell to develop an ultrathin low-reflection metasurface, which could provide extreme controls of phases of the transmitted waves.
Sheng Li Jia, Xiang Wan, Xiao Jian Fu, Yong Jiu Zhao, Tie Jun Cui   +4 more
doaj   +1 more source