Photoswitching properties of photonic band gap material containing azo-polymer liquid crystal

Seiji Kurihara; Masaki Moritsugu; Shoichi Kubo; Sun nam Kim; Tomonari Ogata; Takamasa Nonaka; Osamu Sato

doi:10.1016/j.eurpolymj.2007.09.013

Photoswitching properties of photonic band gap material containing azo-polymer liquid crystal

Seiji Kurihara, Masaki Moritsugu, Shoichi Kubo, Sun nam Kim, Tomonari Ogata, Takamasa Nonaka, Osamu Sato

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

22 Citations (Scopus)

Abstract

A photochemically tunable photonic crystal was prepared by infiltration of the polymer liquid crystal (LC) having azo-chromophores in a SiO₂ inverse opal structure. The SiO₂ inverse opal film infiltrated with the polymer LC reflected a light corresponding to the periodicity as well as the refractive indices of the inverse opal structure. Linearly polarized light irradiation caused the shift of the reflection band to longer wavelength more than 15 nm. This is caused by the formation of uniaxially anisotropic molecular orientation of the polymer LC. The switched state was stable under interior light, and reversible switching of the reflection band can be achieved by the linearly and circularly polarized light irradiation. This photoswitching property will be suitable not only for various optical materials, but also for introduction of defects in the photonic crystals.

Original language	English
Pages (from-to)	4951-4960
Number of pages	10
Journal	European Polymer Journal
Volume	43
Issue number	12
DOIs	https://doi.org/10.1016/j.eurpolymj.2007.09.013
Publication status	Published - 2007 Dec

Keywords

Composites
Photoisomerization
Photonic crystals
Photoswitching
Polymer liquid crystals

ASJC Scopus subject areas

Physics and Astronomy(all)
Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.eurpolymj.2007.09.013

Cite this

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title = "Photoswitching properties of photonic band gap material containing azo-polymer liquid crystal",

abstract = "A photochemically tunable photonic crystal was prepared by infiltration of the polymer liquid crystal (LC) having azo-chromophores in a SiO2 inverse opal structure. The SiO2 inverse opal film infiltrated with the polymer LC reflected a light corresponding to the periodicity as well as the refractive indices of the inverse opal structure. Linearly polarized light irradiation caused the shift of the reflection band to longer wavelength more than 15 nm. This is caused by the formation of uniaxially anisotropic molecular orientation of the polymer LC. The switched state was stable under interior light, and reversible switching of the reflection band can be achieved by the linearly and circularly polarized light irradiation. This photoswitching property will be suitable not only for various optical materials, but also for introduction of defects in the photonic crystals.",

keywords = "Composites, Photoisomerization, Photonic crystals, Photoswitching, Polymer liquid crystals",

author = "Seiji Kurihara and Masaki Moritsugu and Shoichi Kubo and Kim, {Sun nam} and Tomonari Ogata and Takamasa Nonaka and Osamu Sato",

year = "2007",

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AU - Kurihara, Seiji

AU - Moritsugu, Masaki

AU - Kubo, Shoichi

AU - Kim, Sun nam

AU - Ogata, Tomonari

AU - Nonaka, Takamasa

AU - Sato, Osamu

PY - 2007/12

Y1 - 2007/12

N2 - A photochemically tunable photonic crystal was prepared by infiltration of the polymer liquid crystal (LC) having azo-chromophores in a SiO2 inverse opal structure. The SiO2 inverse opal film infiltrated with the polymer LC reflected a light corresponding to the periodicity as well as the refractive indices of the inverse opal structure. Linearly polarized light irradiation caused the shift of the reflection band to longer wavelength more than 15 nm. This is caused by the formation of uniaxially anisotropic molecular orientation of the polymer LC. The switched state was stable under interior light, and reversible switching of the reflection band can be achieved by the linearly and circularly polarized light irradiation. This photoswitching property will be suitable not only for various optical materials, but also for introduction of defects in the photonic crystals.

AB - A photochemically tunable photonic crystal was prepared by infiltration of the polymer liquid crystal (LC) having azo-chromophores in a SiO2 inverse opal structure. The SiO2 inverse opal film infiltrated with the polymer LC reflected a light corresponding to the periodicity as well as the refractive indices of the inverse opal structure. Linearly polarized light irradiation caused the shift of the reflection band to longer wavelength more than 15 nm. This is caused by the formation of uniaxially anisotropic molecular orientation of the polymer LC. The switched state was stable under interior light, and reversible switching of the reflection band can be achieved by the linearly and circularly polarized light irradiation. This photoswitching property will be suitable not only for various optical materials, but also for introduction of defects in the photonic crystals.

KW - Composites

KW - Photoisomerization

KW - Photonic crystals

KW - Photoswitching

KW - Polymer liquid crystals

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ER -

Photoswitching properties of photonic band gap material containing azo-polymer liquid crystal

Abstract

Keywords

ASJC Scopus subject areas

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