Photo-response properties of PBG composite material consisting of inverse opal structure and azo-polymer liquid crystal

S. Kurihara; M. Moritsugu; Shoichi Kubo; Sun-nam Kim; Tomonari Ogata; Takamasa Nonaka; Osamu Sato

doi:10.1117/12.731308

12 October 2007 Photo-response properties of PBG composite material consisting of inverse opal structure and azo-polymer liquid crystal

S. Kurihara, M. Moritsugu, Shoichi Kubo, Sun-nam Kim, Tomonari Ogata, Takamasa Nonaka, Osamu Sato

Author Affiliations +

Proceedings Volume 6767, Photonic Crystals and Photonic Crystal Fibers for Sensing Applications III; 676707 (2007) https://doi.org/10.1117/12.731308
Event: Optics East, 2007, Boston, MA, United States

Abstract

Photo-tunable PBG composite material 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, which is called Bragg diffraction, corresponding to the periodicity as well as the refractive indices of the inverse opal structure. Linearly polarized light irradiation caused the shift of the the Bragg diffraction band to longer wavelength more than 15 nm. This is caused by the formation of uniaxially anistorpic 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 for various optical materials such as memory, display so on.

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S. Kurihara, M. Moritsugu, Shoichi Kubo, Sun-nam Kim, Tomonari Ogata, Takamasa Nonaka, and Osamu Sato "Photo-response properties of PBG composite material consisting of inverse opal structure and azo-polymer liquid crystal", Proc. SPIE 6767, Photonic Crystals and Photonic Crystal Fibers for Sensing Applications III, 676707 (12 October 2007); https://doi.org/10.1117/12.731308

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