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 journalArticlepeer-review

    22 Citations (Scopus)


    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 languageEnglish
    Pages (from-to)4951-4960
    Number of pages10
    JournalEuropean Polymer Journal
    Issue number12
    Publication statusPublished - 2007 Dec


    • 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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