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Cascaded metasurface for separated information encryption [Invited]
Wang, Jiahao1; Zhu, Guodong2; Zhang, Weiguo2; Zhou, Zhou1; Li, Zile1,3; Zheng, Guoxing1,3,4
2023-02-01
摘要For a conventional cascaded metasurface, the combination channel and each single channel are mutually dependent because the phase modulation of a cascaded metasurface is the sum of each single one. Here we propose a cascaded metasurface that can independently encode information into multiple channels. Based on the orientation degeneracy of anisotropic metasurfaces, each single metasurface can produce a quick-response (QR) image in the near field, governed by the Malus law, while the combined channel can produce a holographic image in the far field, governed by geometric phase. The independent and physically separated trichannel design makes information encryption safer.
关键词cascaded metasurfaces optical encryption holography nanoprinting
DOI10.3788/COL202321.020003
发表期刊CHINESE OPTICS LETTERS
ISSN1671-7694
卷号21期号:2页码:5
通讯作者Zhang, Weiguo(zwg@cigit.ac.cn) ; Zheng, Guoxing(gxzheng@whu.edu.cn)
收录类别SCI
WOS记录号WOS:001018441600001
语种英语