Dynamically Polarization‐Dispersion‐Modulated LC‐Integrated Metasurfaces for Hybrid‐Dimensions Encryption
Hairong He, Dian Yu, Yingjie Gu, Hui Yang, Jie Xu, Meiyu Peng, Qiong Xie, Yuting Jiang, S. Zhang, Yueqiang Hu, Hui Jing, Huigao Duan
Abstract
Abstract Multi‐dimensional multiplexing stands as the most widely employed technique utilized to enhance the capacity of metasurfaces. Existing works have strived to explore the upper limits of polarization and wavelength multiplexing technologies, respectively. However, it is still highly challenging to achieve multi‐channel polarization and wavelength multiplexed metasurfaces, not to mention their dynamic counterparts. Here, a generalized paradigm for dynamically polarization‐dispersion‐modulated wavefront shaping via an liquid crystal (LC)‐integrated metasurface is proposed. The underlying mechanism relies on synchronously regulating the intrinsic polarization‐dispersion of LC and a single‐layer anisotropic metasurface constructed of coherent pixels. As a proof of concept, a polarization‐dispersion‐modulated LC‐integrated metasurface platform capable of achieving a dynamic trichromatic six‐polarization‐channel holographic display is numerically and experimentally demonstrated. With voltage as an additional excitation dimension, not limited to the intrinsic physical dimension of the photon, a high‐security hybrid‐dimensions optical information encryption scheme is demonstrated. This work opens up a new door for dynamical high‐capacity multiplexing with metasurfaces, holding potential applications in the fields of advanced information processing and encryption, colorful display, imaging, and data storage.