Broadband electrically controlled reflective metasurface for reconfigurable circularly polarized wavefront manipulation

A broadband, electrically controlled, reconfigurable, circularly polarized reflective metasurface is presented. The chirality of the metasurface structure is changed by switching active elements, which benefits from the tunable current distributions generated by the elaborately designed structure un...

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Veröffentlicht in:Optics express 2023-04, Vol.31 (8), p.13518-13527
Hauptverfasser: Xin, Hai, Yang, Jianing, Tang, Ming-Chun, Zhang, Haochen, Zhang, Zuojun, Qu, Meijun
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container_end_page 13527
container_issue 8
container_start_page 13518
container_title Optics express
container_volume 31
creator Xin, Hai
Yang, Jianing
Tang, Ming-Chun
Zhang, Haochen
Zhang, Zuojun
Qu, Meijun
description A broadband, electrically controlled, reconfigurable, circularly polarized reflective metasurface is presented. The chirality of the metasurface structure is changed by switching active elements, which benefits from the tunable current distributions generated by the elaborately designed structure under x-polarized and y-polarized waves. Notably, the proposed metasurface unit cell maintains a good circular-polarization efficiency in a broadband range of 6.82-9.96 GHz (fractional bandwidth of 37%) with a phase difference of π between the two states. As a demonstration, a reconfigurable circularly polarized metasurface containing 8 × 8 elements was simulated and measured. The results verify that the proposed metasurface can flexibly control circularly polarized waves in a broadband, realizing beam splitting, mirror reflection, and other beam manipulations from 7.4 GHz to 9.9 GHz (fractional bandwidth of 28.9%) by simply adjusting the loaded active elements. The proposed reconfigurable metasurface may offer a promising approach to electromagnetic wave manipulation or communication systems.
doi_str_mv 10.1364/OE.488700
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title Broadband electrically controlled reflective metasurface for reconfigurable circularly polarized wavefront manipulation
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