Multidimensional Encryption by Chip-Integrated Metasurfaces

作者：Shuai Wan, Kening Qu, Yangyang Shi, Zhe Li, Zhe Li, Zejing Wang, Chenjie Dai, Jiao Tang, Zhongyang Li, Zhongyang Li · 发表于：ACS Nano · 年份：2024 · DOI：10.1021/acsnano.4c05724 · 被引用次数：51 · 研究领域：Metamaterials and Metasurfaces Applications、Orbital Angular Momentum in Optics、Chaos-based Image/Signal Encryption

Facing the challenge of information security in the current era of information technology, optical encryption based on metasurfaces presents a promising solution to this issue. However, most metasurface-based encryption techniques rely on limited decoding keys and struggle to achieve multidimensional complex encryption. It hinders the progress of optical storage capacity and puts encryption security at a disclosing risk. Here, we propose and experimentally demonstrate a multidimensional encryption system based on chip-integrated metasurfaces that successfully incorporates the simultaneous manipulation of three-dimensional optical parameters, including wavelength, direction, and polarization. Hence, up to eight-channel augmented reality (AR) holograms are concealed by near- and far-field fused encryption, which can only be extracted by correctly providing the three-dimensional decoding keys and then vividly exhibit to the authorizer with low crosstalk, high definition, and no zero-order speckle noise. We envision that the miniature chip-integrated metasurface strategy for multidimensional encryption functionalities promises a feasible route toward the encryption capacity and information security enhancement of the anticounterfeiting performance and optically cryptographic storage.