Switchable Photonic Crystals Using One-Dimensional Confined Liquid Crystals for Photonic Device Application

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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.
Publisher
AMER CHEMICAL SOC
Issue Date
2017-01
Language
English
Article Type
Article
Keywords

DISTRIBUTED BRAGG REFLECTORS; INFILTRATED INVERSE OPAL; BENT-CORE MOLECULES; PHASE-TRANSITIONS; BAND-GAP; HELICAL NANOSTRUCTURES; OPTICAL-PROPERTIES; ALUMINA; SENSORS; FABRICATION

Citation

ACS APPLIED MATERIALS & INTERFACES, v.9, no.3, pp.3186 - 3191

ISSN
1944-8244
DOI
10.1021/acsami.6b15361
URI
http://hdl.handle.net/10203/220888
Appears in Collection
NT-Journal Papers(저널논문)
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