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

作　　者：Taehyun Kim Eui-Sang Yu Young-Gyu Bae Jongsu Lee In Soo Kim Seok Chung Seung-Yeol Lee Yong-Sang Ryu 

机构地区：[1]Sensor System Research Center,Korea Institute of Science and Technology,Seoul 02792,Republic of Korea [2]Department of Micro/Nano Systems,Korea University,Seoul 02841,Republic of Korea [3]School of Electronic and Electrical Engineering,Kyungpook National University,Daegu 41566,Republic of Korea [4]Nanophotonics Research Center,Korea Institute of Science and Technology,Seoul 02792,Republic of Korea [5]School of Mechanical Engineering,Korea University,Seoul 02841,Republic of Korea

出　　处：《Light(Science & Applications)》2020年第1期325-334,共10页光（科学与应用)（英文版）

基　　金：supported in part by KIST intramural grants(Nos.2E30506,2V07880,and 2E30140);supported by the Basic Science Research Programme through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(2020R1A4A1019518);supported by NRF grant funded by MSIT(2020R1A2B5B03002005);support from the National Research Foundation of Korea(NRF)grant funded by the Korean government(MSIT)(No.2020R1C1C1013474).

摘　　要：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.

关 键 词：ASYMMETRIC GENERATING readily 

分 类 号：O43[机械工程—光学工程]