Photo-tuning of structural color of 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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


A photochemically tunable structural color 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 a structural color, corresponding to the periodicity as well as the refractive indices of the inverse opal structure. Linearly polarized light irradiation caused the shift of the structural color 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.

Original languageEnglish
Title of host publicationLiquid Crystals XI
Publication statusPublished - 2007
EventLiquid Crystals XI - San Diego, CA, United States
Duration: 2007 Aug 262007 Aug 28

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherLiquid Crystals XI
CountryUnited States
CitySan Diego, CA


  • Azobenzene
  • Composites
  • Photonic crystals
  • Photoswitching
  • Polymer liquid crystals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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