基于超构表面的多维光信息加密  

Metasurface-Based Multidimensional Optical Information Encryption

作　　者：魏睿 包燕军 Wei Rui;Bao Yanjun(Guangdong Provincial Key Laboratory of Nanophotonic Manipulation,Institute of Nanophotonics,Jinan University,Guangzhou 511443,Guangdong,China)

机构地区：[1]暨南大学纳米光子学研究院广东省纳米光学操控重点实验室,广东广州511443

出　　处：《中国激光》2023年第18期44-58,共15页Chinese Journal of Lasers

基　　金：国家自然科学基金(92150107,62075246);广东省自然科学基金(2022B1515020019);广州市科技计划项目(202201010361)。

摘　　要：信息技术的发展使得信息加密变得日益重要。光学加密作为一种信息加密手段,具有多维度和高并发速度等优势。然而,传统的光学加密方案往往需要复杂和笨重的光学元件,这导致器件难以小型化和便携化,同时也降低了加密效率。超构表面是一种人工设计的二维平面结构,能够在亚波长尺度上实现对光场的灵活调控,为光学加密提供了一个灵活的平台。近年来,基于超构表面的光学加密方法不断涌现,其利用光在输入端和输出端的多维度来增加加密的复杂度和安全性。基于此,根据加密的端口类型,分别从单一输入端、单一输出端以及输入-输出端联合三个方面对这些方法进行了分析和讨论,并对超构表面光学加密的未来发展趋势进行了展望。Significance Optical encryption is a technique that uses light as a multidimensional carrier of information to encode and decode plaintext images through optical transformations.It has advantages over traditional encryption methods in terms of complexity,security,robustness,and reliability.However,conventional optical encryption schemes often rely on complex and bulky optical components that limit their efficiency and portability.Metasurfaces are artificial structures that can manipulate light at subwavelength scales and control its amplitude,phase,and polarization.They provide a flexible and efficient platform for optical encryption by using different metasurface structures to modulate the incident light and generate encrypted images.The basic principle of metasurface optical encryption is to use the structure to control the input and output keys of the light,the optical parameters modulating the incident light and encrypted image respectively.Only by knowing the correct input and output keys can one decrypt the image and recover the original information.The metasurface structures can utilize different dimensions of light at the input and output ports,such as wavelength,polarization,incident angle,and distance,to achieve single-or dual-port encryption.This study summarizes and discusses three types of metasurface optical encryption schemes,namely,single-input port,single-output port,and input-output port combination,as shown in Fig.1.Progress Metasurface-based optical encryption can utilize the multiple dimensions of light at the input and output ports.For any light beam,all of its parameter dimensions at the input and output ports have definite values,and identifying the dimensions that are used for encryption when information for only one image exists is difficult.Therefore,we focus on the optical encryption that changes at least one or more dimensions to encrypt multiple image signals.The optical encryption based on a single-input port is first discussed,where the analyzed parameters at the output port are fi

关 键 词：光通信 超构表面 光学加密 多维光场 纳米打印 光学全息 输入-输出端口 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构] O439[自动化与计算机技术—计算机科学与技术]