Asymmetric optical camouflage: tuneable reflective colour accompanied by the optical Janus effect

Title
Asymmetric optical camouflage: tuneable reflective colour accompanied by the optical Janus effect
Authors
유용상김인수유의상김태현이종수배영규정석이승열
Keywords
Janus effect; Camouflage; Fabry-Perot; color control; color tuning
Issue Date
2020-10
Publisher
Light: Science and Applications
Citation
VOL 9, 175
Abstract
Going beyond an improved colour gamut, an asymmetric colour contrast, which depends on the viewing direction, and its ability to readily deliver information could create opportunities for a wide range of applications, such as nextgeneration optical switches, colour displays, and security features in anti-counterfeiting devices. Here, we propose a simple Fabry– Perot etalon architecture capable of generating viewing-direction-sensitive colour contrasts and encrypting pre-inscribed information upon immersion in particular solvents (optical camouflage). Based on the experimental verification of the theoretical modelling, we have discovered a completely new and exotic optical phenomenon involving a tuneable colour switch for viewing-direction-dependent information delivery, which we define as asymmetric optical camouflage.
URI
http://pubs.kist.re.kr/handle/201004/71965
ISSN
2047-7538
Appears in Collections:
KIST Publication > Article
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