Photo-induced photonic band gap shift of SiO2 inverse opal films infiltrated by azo-tolane copolymer

Tomomi Shirota; Masaki Moritsugu; Shoichi Kubo; Tomonari Ogata; Takamasa Nonaka; Osamu Sato; Seiji Kurihara

doi:10.1080/15421400903408715

Photo-induced photonic band gap shift of SiO₂ inverse opal films infiltrated by azo-tolane copolymer

Tomomi Shirota, Masaki Moritsugu, Shoichi Kubo, Tomonari Ogata, Takamasa Nonaka, Osamu Sato, Seiji Kurihara

Research output: Contribution to journal › Article › peer-review

Abstract

Photochemically tunable photonic band gap materials were prepared by the infiltration of liquid crystal polymers with azobenzene side chains and tolane side chains indicating larger birefringence into voids of SiO₂ inverse opal films. Linearly polarized light irradiation resulted in transformation from random to anisotropic molecular orientation of azobenzene and tolane side chains, then the azobenzene-tolane copolymer film showed larger birefringence. Thus, the reflection band of the SiO₂ inverse opal films infiltrated with the azobenzene-tolane copolymers was shifted to longer wavelength region by the irradiation of linearly polarized light.

Original language	English
Pages (from-to)	174-181
Number of pages	8
Journal	Molecular crystals and liquid crystals
Volume	516
DOIs	https://doi.org/10.1080/15421400903408715
Publication status	Published - 2010 Jan

Keywords

Azobenzene
Birefringence
Photonic crystal
Tolane

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1080/15421400903408715

Cite this

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title = "Photo-induced photonic band gap shift of SiO2 inverse opal films infiltrated by azo-tolane copolymer",

abstract = "Photochemically tunable photonic band gap materials were prepared by the infiltration of liquid crystal polymers with azobenzene side chains and tolane side chains indicating larger birefringence into voids of SiO2 inverse opal films. Linearly polarized light irradiation resulted in transformation from random to anisotropic molecular orientation of azobenzene and tolane side chains, then the azobenzene-tolane copolymer film showed larger birefringence. Thus, the reflection band of the SiO2 inverse opal films infiltrated with the azobenzene-tolane copolymers was shifted to longer wavelength region by the irradiation of linearly polarized light.",

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AU - Shirota, Tomomi

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AU - Kubo, Shoichi

AU - Ogata, Tomonari

AU - Nonaka, Takamasa

AU - Sato, Osamu

AU - Kurihara, Seiji

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AB - Photochemically tunable photonic band gap materials were prepared by the infiltration of liquid crystal polymers with azobenzene side chains and tolane side chains indicating larger birefringence into voids of SiO2 inverse opal films. Linearly polarized light irradiation resulted in transformation from random to anisotropic molecular orientation of azobenzene and tolane side chains, then the azobenzene-tolane copolymer film showed larger birefringence. Thus, the reflection band of the SiO2 inverse opal films infiltrated with the azobenzene-tolane copolymers was shifted to longer wavelength region by the irradiation of linearly polarized light.

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