Realizing Colorful Holographic Mimicry by Metasurfaces
Realizing Colorful Holographic Mimicry by Metasurfaces
复制标题
通过超表面实现彩色全息拟态
DOI：
10.1002/adma.202005864
复制
发表时间：
2021-04-18
影响因子：
29.4
通讯作者：
Liu, Yongmin
中科院分区：
文献类型：
--
作者：
Xiong, Bo;Xu, Yihao;Liu, Yongmin
拟态是一种生物伪装现象，有机体可以改变其形状和颜色以模仿另一个物体。这里，生物拟态的思想和超表面设计的丰富自由度相结合，实现了全息拟态装置。提出了一种称为相位矩阵变换的通用数学方法来完成全息拟态过程。基于该方法，设计了动态超表面全息图，在空气中显示出“鸟”的图像，当环境变为石油时，显示出“鱼”的清晰图像。此外，为了使拟态行为更加通用，还设计并实验证明了在双波长下操作的全息拟态。此外，通过相位矩阵变换实现的完全独立的相位调制使得该器件的工作效率相对高于传统的离轴照明或交错子阵列的多波长全息器件。这项工作有可能开启一种将仿生学与纳米光子学结合的新研究范式，这可能会为光学信息加密、虚拟/增强现实（VR/AR）和军事伪装系统带来新的应用。
Mimicry is a biological camouflage phenomenon whereby an organism can change its shape and color to resemble another object. Herein, the idea of biological mimicry and rich degrees of freedom in metasurface designs are combined to realize holographic mimicry devices. A general mathematical method, called phase matrix transformation, to accomplish the holographic mimicry process is proposed. Based on this method, a dynamic metasurface hologram is designed, which shows an image of a “bird” in the air, and a distinct image of a “fish” when the environment is changed to oil. Furthermore, to make the mimicry behavior more generic, holographic mimicry operating at dual wavelengths is also designed and experimentally demonstrated. Moreover, the fully independent phase modulation realized by phase matrix transformation makes the working efficiency of the device relatively higher than the conventional multiwavelength holographic devices with off‐axis illumination or interleaved subarrays. The work potentially opens a new research paradigm interfacing bionics with nanophotonics, which may produce novel applications for optical information encryption, virtual/augmented reality (VR/AR), and military camouflage systems.