Reconfigurable Janus Metasurface with Chiral Meta-atoms for Multi-Channel Vortex Beams and Metasurface Holography Multiplexing
Peng Gao, cong chen, Yaowei Dai, Xinyan Wang, Hongzhong Cui, Xiaojun Zhu, Hai Liu
Abstract
). Our results demonstrate that chiral meta-atoms enable dynamic switching between asymmetric transmission and reflection at varying temperatures. In the design of multi-channel vortex beams, this reconfigurable Janus metasurface can generate vortex beams with different spins by active control of propagation direction or temperature. In multi-channel metasurface holography designs, this chiral unit-based reconfigurable Janus metasurface can actively produce eight-channel metasurface holograms by manipulating chiral characteristics, propagation direction, or temperature. Additionally, in the design of metasurfaces for information encryption, four distinct metasurface holograms have been generated, which can be synthesized into a unique decrypted image. This research not only offers a novel approach for the design of multi-path multiplexing metasurfaces but also paves the way for applications in multi-channel structured light and promoting high-capacity and high-secure holographic applications. Consequently, it provides new possibilities for terahertz optical information encryption, data storage, and intelligent information processing.