Results 41 to 50 of about 4,017 (247)

A One-Bit Programmable Multi-Functional Metasurface for Microwave Beam Shaping

Micromachines, 2023
In this paper, we demonstrate a multi-functional metasurface for microwave beam-shaping application. The metasurface consists of an array of programmable unit cells, and each unit cell is integrated with one varactor diode. By turning the electrical bias
Wu Zhang, Jiahan Lin, Zitao Zheng, Yusong Gao, Jifang Tao, Wenli Shang, Meng Zhang   +6 more
doaj   +1 more source

Highly integrated programmable metasurface for multifunctions in reflections and transmissions

APL Materials, 2022
Programmable manipulations on both reflections and transmissions usually require multi-layer metasurfaces, numerous active components, and control circuits, leading to a larger profile, complicated bias circuit design, and higher cost.
Qian Ma, Qiao Ru Hong, Xinxin Gao, Qiang Xiao, Lei Chen, Tie Jun Cui   +5 more
doaj   +1 more source

Two-Dimensional Beam Steering Based on Compact Programmable Coding Metasurface

Applied Sciences, 2022
A programmable coding metasurface provides unprecedented flexibility to manipulate electromagnetic waves dynamically. By controlling the peculiarity of subwavelength artificial atoms, devices with metasurfaces perform various functionalities.
Fei Yang, Fan Xu, Chenxi Liu, Xinyu Yang, Ziqiang Wang, Junwei Wu, Xiaojian Fu   +6 more
doaj   +1 more source

Programmable nonreciprocal meta-prism

Scientific Reports, 2021
Optical prisms are made of glass and map temporal frequencies into spatial frequencies by decomposing incident white light into its constituent colors and refract them into different directions.
Sajjad Taravati, George V. Eleftheriades
doaj   +1 more source

An Optically-Programmable Absorbing Metasurface [PDF]

2018 IEEE International Symposium on Circuits and Systems (ISCAS), 2018
A tunable metasurface absorber is presented in this work using an optically-programmable capacitor as the tuning element. The tuning element does not employ conventional semiconductor technologies to operate but rather a bases its tuning by changing the optomechanical properties of its dielectric, poly disperse red 1 acrylate (PDR1A).
Kossifos, K. M., Antoniades, Marco A., Georgiou, Julius, Jaafar, A. H., Kemp, N. T., Kossifos, K. M., Antoniades, Marco A., Georgiou, Julius, Jaafar, A. H., Kemp, N. T.   +9 more
openaire   +4 more sources

Programmable Manipulations of Terahertz Beams by Graphene-Based Metasurface With Both Amplitude and Phase Modulations

Frontiers in Materials, 2022
Terahertz metasurface with digital, programmable control recently gained considerable attention for its potential applications in high-speed imaging, nondestructive sensing, and wireless communication.
Chenxi Liu, Fei Yang, Xiaojian Fu, Junwei Wu, Lei Zhang   +4 more
doaj   +1 more source

Fault Tolerance in Programmable Metasurfaces: The Beam Steering Case [PDF]

, 2019
Metasurfaces, the two-dimensional counterpart of metamaterials, have caught great attention thanks to their powerful control over electromagnetic waves.
Abadal, Sergi, Alarcón, Eduard, Cabellos-Aparicio, Albert, Georgiou, Julius, Taghvaee, Hamidreza   +4 more
core   +2 more sources

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

Reprogrammable graphene-based metasurface mirror with adaptive focal point for THz imaging [PDF]

, 2019
Recent emergence of metasurfaces has enabled the development of ultra-thin flat optical components through different wavefront shaping techniques at various wavelengths.
Abadal Cavallé, Sergi, Alarcón Cot, Eduardo José, Cabellos Aparicio, Alberto, Faraji-Dana, Reza, Hosseininejad, Seyed Ehsan, Neshat, Mohammad, Rouhi, Kasra   +6 more
core   +4 more sources

Intelligent Metasurfaces with Continuously Tunable Local Surface Impedance for Multiple Reconfigurable Functions [PDF]

, 2019
Electromagnetic metasurfaces can be characterized as intelligent if they are able to perform multiple tunable functions, with the desired response being controlled by a computer influencing the individual electromagnetic properties of each metasurface ...
Kafesaki, Maria, Kantartzis, Nikolaos V., Kwon, Do-Hoon, Liu, Fu, Mirmoosa, Mohammad Sajjad, Pitilakis, Alexandros, Soukoulis, Costas M., Tasolamprou, Anna C., Tretyakov, Sergei A., Tsilipakos, Odysseas   +9 more
core   +4 more sources