Reprogrammable meta-hologram for optical encryption

Abstract Meta-holographic encryption is a potentially important technique for information security. Despite rapid progresses in multi-tasked meta-holograms, the number of information channels available in metasurfaces is limited, making meta-holographic encryption vulnerable to some attacking algori...

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Bibliographic Details
Published inNature communications Vol. 11; no. 1; pp. 1 - 5
Main Authors Qu, Geyang, Yang, Wenhong, Song, Qinghai, Liu, Yilin, Qiu, Cheng-Wei, Han, Jiecai, Tsai, Din-Ping, Xiao, Shumin
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group 30.10.2020
Nature Publishing Group UK
Nature Portfolio
Subjects
Algorithms
Encryption
Holograms
Holography
Incident light
Lasers
Light
Optics
Security
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Summary:Abstract Meta-holographic encryption is a potentially important technique for information security. Despite rapid progresses in multi-tasked meta-holograms, the number of information channels available in metasurfaces is limited, making meta-holographic encryption vulnerable to some attacking algorithms. Herein, we demonstrate a re-programmable metasurface that can produce arbitrary holographic images for optical encryption. The encrypted information is divided into two matrices. These two matrices are imposed to the incident light and the metasurface, respectively. While the all-dielectric metasurface is static, the phase matrix of incident light provides additional degrees of freedom to precisely control the eventual functions at will. With a single Si metasurface, arbitrary holographic images and videos have been transported and decrypted. We hope that this work paves a more promising way to optical information encryption and authentication.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-020-19312-9