Affiliation:
1. School of Physics Southeast University Nanjing 211189 China
2. Department of Electrical and Computer Engineering National University of Singapore Singapore 117583 Singapore
3. Center for Intelligent Sensors and MEMS(CISM) National University of Singapore Singapore 117542 Singapore
Abstract
AbstractImage steganography based on intelligent devices is one of the effective routes for safely and quickly transferring secret information. However, optical image steganography has attracted far less attention than digital one due to the state‐of‐the‐art technology limitations of high‐resolution optical imaging in integrated devices. Optical metasurfaces, composed of ultrathin subwavelength meta‐atoms, are extensively considered for flat optical‐imaging nano‐components with high‐resolutions as competitive candidates for next‐generation miniaturized devices. Here, multiplex imaging metasurfaces composed of single nanorods are proposed under a detailed strategy to realize optical image steganography. The simulation and experimental results demonstrate that an optical steganographic metasurface can simultaneously transfer independent secret image information to two receivers with special keys, without raising suspicions for the general public under the cloak of a cover image. The proposed optical steganographic strategy by metasurfaces can arbitrarily distribute a continuous grayscale image together with a black‐and‐white image in separate channels, implying the distinguishing feature of high‐density information capacity for integration and miniaturization in optical meta‐devices.
Funder
National Natural Science Foundation of China
China Scholarship Council
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
8 articles.
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