• Photonics Research
  • Vol. 10, Issue 3, 03000678 (2022)
Hongqiang Zhou1, Xin Li1, Zhentao Xu1、2, Xiaowei Li3, Guangzhou Geng4, Junjie Li4, Yongtian Wang1, and Lingling Huang1、*
Author Affiliations
  • 1Beijing Engineering Research Center of Mixed Reality and Advanced Display, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
  • 2Beijing Aerospace Automatic Control Institute, Beijing 100143, China
  • 3Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
  • 4Institute of Physics, Chinese Academy of Sciences, Beijing 100191, China
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    DOI: 10.1364/PRJ.443063 Cite this Article
    Hongqiang Zhou, Xin Li, Zhentao Xu, Xiaowei Li, Guangzhou Geng, Junjie Li, Yongtian Wang, Lingling Huang. Correlated triple hybrid amplitude and phase holographic encryption based on a metasurface[J]. Photonics Research, 2022, 10(3): 03000678 Copy Citation Text show less

    Abstract

    Metasurface holography is becoming a universal platform that has made a considerable impact on nanophotonics and information optics, due to its advantage of large capacity and multiple functionalities. Here, we propose a correlated triple amplitude and phase holographic encryption based on an all-dielectric metasurface. We develop an optimized holographic algorithm to obtain quantitatively correlated triple holograms, which can encrypt information in multiple wavelength and polarization channels. We apply the “static” and “dynamic” pixels in our design, respectively. Two kinds of isotropic square nanofins are selected, one functioning as a transmitter and the other functioning as a blocker counterintuitively at both working wavelengths, while another anisotropic rectangle nanofin can transmit or block light in co-polarization selectively, mimicking “dynamic” amplitude switches. Meanwhile, such “dynamic” nanofins can simultaneously function as a phase modulator in cross-polarization only at the transmission wavelength. That is, through smart design, different dielectric meta-atoms functioning as spectral filters as well as phase contributors can compositely achieve triple hybrid amplitude and phase holograms. Such strategy promises to be applied in compact large-capacity information storage, colorful holographic displays, optical encryption, multifunctional imaging devices, and so on.
    I(x,y)|F[H(x0,y0)]|2,

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    PSNR=10log10(2552MSE),

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    Copy Citation Text
    Hongqiang Zhou, Xin Li, Zhentao Xu, Xiaowei Li, Guangzhou Geng, Junjie Li, Yongtian Wang, Lingling Huang. Correlated triple hybrid amplitude and phase holographic encryption based on a metasurface[J]. Photonics Research, 2022, 10(3): 03000678
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