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arXiv · 2405.09844

Electrically switchable $2^N$-channel wave-front control with N cascaded polarization-dependent metasurfaces

Zhiyao Ma·Tian Tian·Yuxuan Liao·Xue Feng·Yongzhuo Li·Kaiyu Cui·Fang Liu·Hao Sun·Wei Zhang·Yidong Huang
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Abstract

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 functional channels without intrinsic noise or cross-talk. 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 deflecting 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, which are potential for the applications of LiDAR, glasses-free 3D display, OAM (de)multiplexing, and varifocal meta-lens.

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Zhiyao Ma, Tian Tian, Yuxuan Liao, Xue Feng, Yongzhuo Li, Kaiyu Cui, Fang Liu, Hao Sun, Wei Zhang, Yidong Huang. 2024-05-16. Electrically switchable $2^N$-channel wave-front control with N cascaded polarization-dependent metasurfaces. https://doi.org/10.1038/s41467-024-52676-w

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