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Single Pixel Imaging Key for Holographic Encryption Based on Spatial Multiplexing Metasurface
Small ( IF 13.0 ) Pub Date : 2022-08-07 , DOI: 10.1002/smll.202203197
Jingxiao Yan 1 , Qunshuo Wei 1 , Yin Liu 1 , Guangzhou Geng 2 , Junjie Li 2 , Xiaowei Li 3 , Xin Li 1 , Yongtian Wang 1 , Lingling Huang 1
Affiliation  

Compared with the traditional holographic technology, metasurface holography is a promising technology due to the large field angle and high spatial resolution. Thanks to the precise control of phase, amplitude, polarization and so on, metasurface holography provides a flexible platform for light modulation, optical encryption and so on. Besides, the process of image reconstruction by single pixel imaging is similar to a form of encoding and decoding, which is realized by calculating the correlation between a series of modulation patterns and their corresponding intensity signals. In this work, an optical encryption scheme is proposed based on spatial multiplexing metasurface, which depends on the combination of holographic technology and single pixel imaging technology. In the encryption scheme, the image transmitted by single pixel imaging based on metasurface is used as the addressing key of holography. Besides, illuminating different positions of the metasurface can generate different holographic reconstructed images, and there is 50% information overlapped between adjacent sub-holograms. This work makes use of the spatial multiplexing property of metasurface, which can complete different functions, paving the way for the application in the field of optical imaging encryption and information security.

中文翻译:

基于空间复用超表面的全息加密单像素成像密钥

与传统的全息技术相比,超表面全息技术具有大视场角和高空间分辨率等优点,是一种很有前景的技术。由于相位、幅度、偏振等的精确控制,超表面全息为光调制、光学加密等提供了灵活的平台。此外,单像素成像重建图像的过程类似于编码和解码的一种形式,是通过计算一系列调制模式与其对应的强度信号之间的相关性来实现的。在这项工作中,提出了一种基于空间复用超表面的光学加密方案,该方案依赖于全息技术和单像素成像技术的结合。在加密方案中,将基于超表面的单像素成像传输的图像作为全息的寻址键。此外,照射超表面的不同位置可以生成不同的全息重建图像,相邻的亚全息图之间有50%的信息重叠。该工作利用超表面的空间复用特性,可以完成不同的功能,为在光学成像加密和信息安全领域的应用铺平了道路。
更新日期:2022-08-07
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