Integrated Metasurfaces with Microprints and Helicity-Multiplexed Holograms for Real-Time Optical Encryption
Integrated Metasurfaces with Microprints and Helicity-Multiplexed Holograms for Real-Time Optical Encryption
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DOI：
10.1002/adom.201902020
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发表时间：
2020-02-23
影响因子：
9
通讯作者：
Duan, Huigao
中科院分区：
文献类型：
--
作者：
Luo, Xuhao;Hu, Yueqiang;Duan, Huigao
光加密具有多通道、高复杂度和艺术性等特点，已成为现代信息安全的重要手段之一。近年来出现的由平面亚波长超材料组成的超表面光学系统，由于其具有操纵各种光学参数和增强信息存储容量的能力，已被设计为光学加密的理想平台。然而，加密信道有限，实时加密能力不足，阻碍了其实际应用。提出了一种可同时调节光波振幅、相位和偏振的新型集成超表面，实现了微印与可忽略串扰的螺旋复用超全息相结合。通过将在线可编辑的快速响应代码编码到微缩版画中作为密钥库，展示了一种光学加密设备，该设备具有2(6)-1的存储容量，这些存储容量由波长和螺旋相关的全息图像赋予，可以实时使用。该集成方案实现了多维信息存储和实时加解密能力，为超表面器件在光学加密领域的实际应用提供了可行的途径。
Optical encryption with multichannel, high complexity, and artistry characteristics has become one of the most significant approaches for modern information security. Recently emerged metasurface-based optics consisting of planar subwavelength metamaterials has been engineered as an ideal platform for optical encryption because of its capability of manipulating various optical parameters and enhancing information storage capacity. However, limited encrypted channels and insufficient real-time encryption abilities hinder its practical applications. A novel integrated metasurface is proposed, which can regulate the amplitude, phase, and polarization of light wave simultaneously to realize the combination of microprint and helicity-multiplexed meta-holography with negligible crosstalk. By encoding an online editable quick response code into the microprint as a keystore, an optical encryption device is demonstrated with 2(6)-1 storage capacity endowed by wavelength- and helicity-dependent hologram images that can be employed in real time. The integration scheme enables multidimensional information storage and real-time encryption and decryption capability, which provides an approachable way for the practical application of metasurface devices in the field of optical encryption.