@inproceedings{c2f6e8c900844d819ab4f641b77ef04c,
title = "Photoswitching properties of photonic band gap materials containing azo-polymer liquid crystal",
abstract = "Photochemically tunable photonic band gap materials were prepared by infiltration of liquid crystal polymers having azobenzene groups into voids of SiO2 inverse opal films. Linearly polarized light irradiation resulted in transformation from a random to an anisotropic molecular orientation of azobenzene side chains in the voids of the SiO2 inverse opal film, leading to the reversible and stable shift of the reflection band to longer wavelength more than 15 nm. In order to improve switching properties, we used copolymers with azobenzene monomer and tolane monomer, which indicate higher birefringence, as infiltration materials into the voids. The azo-tolane copolymers were found to show the higher birefringence than azobenzene homopolymers by the linearly polarized light irradiation. Thus, the reflection band of the SiO2 inverse opal film infiltrated with the azo-tolane copolymers was shifted to long wavelength region more than 55 nm by the irradiation of linearly polarized light.",
author = "Masaki Moritsugu and Tomomi Shirota and Shoichi Kubo and Kim, {Sun Nam} and Tomonari Ogata and Takamasa Nonaka and Osamu Sato and Seiji Kurihara",
year = "2008",
doi = "10.1117/12.794633",
language = "English",
isbn = "9780819472700",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Liquid Crystals XII",
note = "Liquid Crystals XII ; Conference date: 11-08-2008 Through 12-08-2008",
}