Switchable photonic crystals using one-dimensional confined liquid crystals for photonic device application

Title
Switchable photonic crystals using one-dimensional confined liquid crystals for photonic device application
Authors
이원석Suk-Won Choi류성호김민준윤동기
Issue Date
2017-01
Publisher
ACS Applied Materials & Interfaces
Citation
VOL 9, NO 3-3191
Abstract
Photonic crystals (PCs) have recently attracted considerable attention, with much effort devoted to photonic bandgap (PBG) control for varying the reflected color. Here, fabrication of a modulated one-dimensional (1D) anodic aluminum oxide (AAO) PC with a periodic porous structure is reported. The PBG of the fabricated PC can be reversibly changed by switching the ultraviolet (UV) light on/off. The AAO nanopores contain a mixture of photoresponsive liquid crystals (LCs) with irradiation-activated cis/trans photoisomerizable azobenzene. The resultant mixture of LCs in the porous AAO film exhibits a reversible PBG, depending on the cis/trans configuration of azobenzene molecules. The PBG switching is reliable over many cycles, suggesting that the fabricated device can be used in optical and photonic applications such as light modulators, smart windows, and sensors.
URI
http://pubs.kist.re.kr/handle/201004/71095
ISSN
1944-8244
Appears in Collections:
KIST Publication > Article
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