Open AccessTri-channel metasurface for watermarked structural-color nanoprinting and holographic imaging
Author(s) -
Naixuan Zhao,
Zile Li,
Guodong Zhu,
Jiaxin Li,
Liya Deng,
Qi Dai,
Weiguo Zhang,
Zhixue He,
Guoxing Zheng
Publication year - 2022
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.472789
Subject(s) - holography , encryption , multiplexing , optics , polarization (electrochemistry) , computer science , channel (broadcasting) , ghost imaging , computer vision , physics , telecommunications , chemistry , operating system
Structural-color nanoprinting, which can generate vivid colors with spatial resolution at subwavelength level, possesses potential market in optical anticounterfeiting and information encryption. Herein, we propose an ultracompact metasurface with a single-cell design strategy to establish three independent information channels for simultaneous watermarked structural-color nanoprinting and holographic imaging. Dual-channel spectrum manipulation and single-channel phase manipulation are combined together by elaborately introducing the orientation degeneracy into the design of variable dielectric nanobricks. Hence, a structural-color nanoprinting image covered with polarization-dependent watermarks and a holographic image can be respectively generated under different decoded environments. The proposed metasurface shows a flexible method for tri-channel image display with high information capacity, and exhibits dual-mode anticounterfeiting with double safeguards, i.e., polarization-controlled watermarks and a far-field holographic image. This study provides a feasible route to develop multifunctional metasurfaces for applications including optical anticounterfeiting, information encryption and security, information multiplexing, etc.