Results 51 to 60 of about 1,179 (209)

A Polarization‐Modulated Information Metasurface for Encryption Wireless Communications

Advanced Science, 2022
Programmable and information metasurfaces have shown great potentials in wireless communications, but there are few reports on encrypted communications. In this paper, a programmable polarization‐modulated (PoM) information metasurface is proposed, which
Hai Lin Wang, Hui Feng Ma, Tie Jun Cui
doaj   +1 more source

Asynchronous Circuits as an Enabler of Scalable and Programmable Metasurfaces [PDF]

2018 IEEE International Symposium on Circuits and Systems (ISCAS), 2018
Metamaterials and metasurfaces have given possibilities for manipulating electromagnetic (EM) waves that in the past would have seemed impossible. The majority of metasurface designs are suitable for a particular frequency and angle of incidence. One long-sought objective is the design of programmable metasurfaces to dynamically manipulate a variety of
Petrou, Loukas, Karousios, Petros, Georgiou, Julius, Petrou, Loukas, Karousios, Petros, Georgiou, Julius   +5 more
openaire   +3 more sources

Metasurface-Based Multidimensional Light-Field Manipulation: From Technologies to Applications. [PDF]

Adv Sci (Weinh)
Multidimensional metasurfaces enable versatile manipulation of multiple optical degrees of freedom, including phase, amplitude, polarization, wavelength, and orbital angular momentum. This review summarizes their fundamental mechanisms, emerging strategies for multidimensional light‐field control, and key applications in optical computing, imaging ...
Yin H, Sun S, Zhang J, Hu J, Qiao Y, Chen L, Li J.   +6 more
europepmc   +2 more sources

Evolution of the Electromagnetic Manipulation: From Tunable to Programmable and Intelligent Metasurfaces

Micromachines, 2021
Looking back on the development of metamaterials in the past 20 years, metamaterials have gradually developed from three-dimensional complex electromagnetic structures to a two-dimensional metasurface with a low profile, during which a series of ...
Sisi Luo, Jianjiao Hao, Fuju Ye, Jiaxin Li, Ying Ruan, Haoyang Cui, Wenjun Liu, Lei Chen   +7 more
doaj   +1 more source

Programmable VO2 metasurface for terahertz wave beam steering

iScience, 2022
Summary: Programmable vanadium dioxide (VO2) metasurface is proposed at THz frequencies. The insulating and metallic states of VO2 can be switched via external electrical stimulation, resulting in the dynamical modulation of electromagnetic response. The
Daquan Yang, Weiguang Wang, Erpeng Lv, Haiming Wang, Bingchao Liu, Yanzhao Hou, Jin-hui Chen   +6 more
doaj   +1 more source

Programmable Metasurface-Based Multicast Systems: Design and Analysis [PDF]

IEEE Journal on Selected Areas in Communications, 2020
This paper considers a multi-antenna multicast system with programmable metasurface (PMS) based transmitter. Taking into account of the finite-resolution phase shifts of PMSs, a novel beam training approach is proposed, which achieves comparable performance as the exhaustive beam searching method but with much lower time overhead.
Xiaoling Hu 0001, Caijun Zhong, Yongxu Zhu, Xiaoming Chen 0001, Zhaoyang Zhang 0001   +4 more
openaire   +3 more sources

Twin-Lever Multifunctional Meta-Optics With High Longitudinal Tolerance. [PDF]

Adv Sci (Weinh)
We introduce a single‐layer, CMOS‐compatible metasurface that allows for polarization‐programmable, achromatic broadband dual‐mode imaging with high longitudinal tolerance. The twin‐lever design combines bright‐field focusing and vortex‐based edge‐enhanced imaging while managing axial intensity distribution from 488 to 633 nm.
Javed I, Kim K, Shah AR, Kang D, Kim J, Satti AJ, Liu X, Zubair M, Xiong J, Mehmood MQ, Rho J.   +10 more
europepmc   +2 more sources

Programmable metasurface RCS prediction under obstacles based on DNN

Frontiers in Materials, 2022
Programmable metasurfaces have attracted significant attention in various applications such as radar and 6G communications, owing to their ability freely shape the far-field pattern.
Yutong Jiang, Rongrong Zhu, Rongrong Zhu, Bo Yang, Huan Lu, Huan Lu, Tianhang Chen, Bin Zheng, Bin Zheng   +8 more
doaj   +1 more source

Terahertz metasurface enabled by barium strontium titanate ferroelectric film

EPJ Applied Metamaterials
In this paper, a Ba0.5Sr0.5TiO3 (BST) ferroelectric film is prepared and characterized in the terahertz band. Subsequently, based on the prepared BST film, a metasurface is proposed to manipulate electromagnetic waves.
Fu Yuan, Fu Xiaojian, Guo Yunsheng
doaj   +1 more source

Computation‐Less, Bias‐Free, and Ultra‐Broadband Photodetector for On‐Chip Edge Extraction

Advanced Materials, EarlyView.
A computation‐less, bias‐free, and ultra‐broadband photodetector directly converts local optical‐intensity gradients into signed photocurrents through a position‐dependent bi‐directional photoresponse. This intrinsic physical sensing mechanism enables single‐pixel edge extraction from the near‐infrared to the long‐wave infrared at room temperature ...
Jintao Fu, Hao Jiang, Xingsi Liu, Fakun Wang, Yang Peng, Qi Jie Wang, Weibo Gao, Xingzhan Wei, Cheng‐Wei Qiu   +8 more
wiley   +1 more source