Journal
OPTICS EXPRESS
Volume 27, Issue 4, Pages 4480-4487Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.004480
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- Air Force Office of Scientific Research (AFOSR) [FA9550-14-1-0279]
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An electric field drives most dye-doped liquid crystal devices. Here, we demonstrate a new photo-responsive dye-doped self-organized cholesteric liquid crystal device. Upon UV or blue light exposure, the helical twisting power of the chiral azobenzene changes because of the trans-cis isomerization. As a result, the initially vertically aligned liquid crystal directors and dye molecules will change from transparent state to dark state. Such a polarizer-free photo-activated dimmer can be used for wide range of applications, such as diffractive photonic devices, portable information system, vehicular head-up displays, and as a smart window for energy-saving buildings. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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