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Crypto-Display in Dual-Mode Metasurfaces by Simultaneous Control of Phase and Spectral Responses SCIE SCOPUS

Title
Crypto-Display in Dual-Mode Metasurfaces by Simultaneous Control of Phase and Spectral Responses
Authors
Yoon, GwanhoLee, DasolNam, Ki TaeRho, Junsuk
Date Issued
2018-07
Publisher
AMER CHEMICAL SOC
Abstract
Although conventional metasurfaces have demonstrated many promising functionalities in light control by tailoring either phase or spectral responses of subwavelength structures, simultaneous control of both responses has not been explored yet. Here, we propose a concept of dual-mode metasurfaces that enables simultaneous control of phase and spectral responses for two kinds of operation modes of transmission and reflection, respectively. In the transmission mode, the dual-mode metasurface acts as conventional metasurfaces by tailoring phase distribution of incident light. In the reflection mode, a reflected colored image is produced under white light illumination. We also experimentally demonstrate a crypto-display as one application of the dual-mode metasurface. The crypto-display looks a normal reflective display under white light illumination but generates a hologram that reveals the encrypted phase information under single-wavelength coherent light illumination. Because two operation modes do not affect each other, the crypto-display can have applications in security techniques.
URI
https://oasis.postech.ac.kr/handle/2014.oak/94286
DOI
10.1021/acsnano.8b01344
ISSN
1936-0851
Article Type
Article
Citation
ACS NANO, vol. 12, no. 7, page. 6421 - 6428, 2018-07
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노준석RHO, JUNSUK
Dept of Mechanical Enginrg
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