Electrically switchable 2 N -channel wave-front control for certain functionalities with N cascaded polarization-dependent metasurfaces.

Autor: Ma Z; Department of Electronic Engineering, Tsinghua University, Beijing, China., Tian T; Department of Electronic Engineering, Tsinghua University, Beijing, China., Liao Y; Department of Electronic Engineering, Tsinghua University, Beijing, China., Feng X; Department of Electronic Engineering, Tsinghua University, Beijing, China. x-feng@tsinghua.edu.cn., Li Y; Department of Electronic Engineering, Tsinghua University, Beijing, China., Cui K; Department of Electronic Engineering, Tsinghua University, Beijing, China., Liu F; Department of Electronic Engineering, Tsinghua University, Beijing, China., Sun H; Department of Electronic Engineering, Tsinghua University, Beijing, China., Zhang W; Department of Electronic Engineering, Tsinghua University, Beijing, China., Huang Y; Department of Electronic Engineering, Tsinghua University, Beijing, China. yidonghuang@tsinghua.edu.cn.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 Sep 27; Vol. 15 (1), pp. 8370. Date of Electronic Publication: 2024 Sep 27.
DOI: 10.1038/s41467-024-52676-w
Abstrakt: Metasurfaces with tunable functionalities are greatly desired for modern optical system and various applications. To increase the operating channels of polarization-multiplexed metasurfaces, we proposed a structure of N cascaded dual-channel metasurfaces to achieve 2 N electrically switchable channels without intrinsic loss or cross-talk for certain functionalities, including beam steering, vortex beam generation, lens, etc. As proof of principles, we have implemented a 3-layer setup to achieve 8 channels. In success, we have demonstrated two typical functionalities of vortex beam generation with switchable topological charge of l = -3 ~ +4 or l = -1 ~ -8, and beam steering with the deflection direction switchable in an 8×1 line or a 4×2 grid. We believe that our proposal would provide a practical way to significantly increase the scalability and extend the functionality of polarization-multiplexed metasurfaces. Although this method is not universal, it is potential for the applications of LiDAR, glasses-free 3D display, OAM (de)multiplexing, and varifocal meta-lens.
(© 2024. The Author(s).)
Databáze: MEDLINE
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