Phototunable Liquid Crystalline Photonic Band Gap Material

Masaki Moritsugu Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University, Kurokami, Kumamoto, Japan

Sun-nam Kim Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University, Kurokami, Kumamoto, Japan

Tomonari Ogata Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University, Kurokami, Kumamoto, Japan

Takamasa Nonaka Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University, Kurokami, Kumamoto, Japan

Seiji Kurihara Department of Applied Chemistry and Biochemistry, Faculty of Engineering, Kumamoto University, Kurokami, Kumamoto, JapanCorrespondence[email protected]

Shoichi Kubo Department of Applied Chemistry, School of Engineering, The University of Tokyo, Komaba, Tokyo, Japan

Osamu Sato Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga-koen, Fukuoka, Japan

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Abstract

We fabricated phototunable photonic crystals by infiltrating an azobenzen liquid crystal polymer (PLC) into voids of an opal or an inverse opal film. Azochromophores of PLC could be oriented perpendicular to the polarization direction of incident light, causing a change in refractive index of the PLC domain. Consequently, photonic band gap could be reversibly shifted by using the photo-induced molecular orientation. In addition, the photonic band gap in the inverse opal film was sifted larger than that in opal.

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Phototunable Liquid Crystalline Photonic Band Gap Material

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Phototunable Liquid Crystalline Photonic Band Gap Material

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