Journal
NATURE COMMUNICATIONS
Volume 12, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-021-23814-5
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Funding
- Samsung Research Funding & Incubation Center for Future Technology - Samsung Electronics [SRFC-IT1901-05]
- NRF Sejong Science fellowship - Ministry of Science and ICT of the Korean government [NRF-2021R1C1C2004291]
- Hyundai Motor Chung Mong-Koo Foundation
- NRF fellowship - Ministry of Education of the Korean government [NRF-2019R1A6A3A13091132]
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The authors introduced a bi-functional metasurface that combines structural color printing and polarization encoded vectorial holography, showcasing an electrically tunable optical security platform for advanced encryption applications. This metasurface offers versatile polarization control with eight channels, where structural color prints are observed under white light and polarization encoded holograms are reconstructed under laser illumination. A proof-of-concept electrically tunable optical security platform, doubly encrypted for security and anticounterfeiting applications, is developed incorporating liquid crystals.
The authors present a bi-functional metasurface, combining structural color printing observed under white light and polarization encoded It is appropriate. vectorial holography. A pixelated design is used encode multiple holographic images, and they demonstrate an electrically tunable optical security platform. Vectorial holography has gained a lot of attention due to the promise of versatile polarization control of structured light for enhanced optical security and multi-channel optical communication. Here, we propose a bifunctional metasurface which combines both structural color printing and vectorial holography with eight polarization channels towards advanced encryption applications. The structural colour prints are observed under white light while the polarization encoded holograms are reconstructed under laser illumination. To encode multiple holographic images for different polarization states, a pixelated metasurface is adopted. As a proof-of-concept, we devise an electrically tunable optical security platform incorporated with liquid crystals. The optical security platform is doubly encrypted: an image under white light is decrypted to provide the first key and the corresponding information is used to fully unlock the encrypted information via projected vectorial holographic images. Such an electrically tunable optical security platform may enable smart labels for security and anticounterfeiting applications.
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