Photoinduced polymer-stabilised chiral nematic liquid crystal films reflecting both right- and left-circularly polarised light |
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| Authors: | Yuzhen Zhao Lanying Zhang Zemin He Gang Chen Dong Wang Haiquan Zhang |
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| Institution: | 1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, Chinahqzhang@ysu.edu.cn;3. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, China;4. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, China;5. Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing, China |
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| Abstract: | A phototunable polymer-stabilised liquid crystal film reflecting both right- and left-circularly polarised light has been successfully fabricated by a washout/refill method. The film was obtained by prefabricating the polymer network with a left-handed helical structure and then refilling a light-driven chiral nematic liquid crystal with a right-handed helical structure into the network. Interestingly, the reflection wavelength and the reflectivity properties can be precisely tuned by UV-light irradiation. A hyper-reflective notch, the reflectivity of which approaches 100%, was achieved in a layer when the pitch lengths of the two opposite helical structures are almost the same. Moreover, their original state can be properly returned by visible-light irradiation. |
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| Keywords: | washout/refill method light-controllable property simultaneous double reflection hyper-reflectivity |
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