In-situ observation of thermal amplification of photogenerated optical anisotropy of films of azobenzene polymers

Masatoshi Kidowaki, Takenori Fujiwara, Shin'ya Morino, Kunihiro Ichimura, Joachim Stumpe

Research output: Contribution to journalConference article

Abstract

Thin films of polymers containing p-cyanoazobenzene side chains were studied to reveal its applicability for optical storage media, surface grating optics and aligning films for liquid crystal (LC) display devices. We followed the generation of optical anisotropy of LPL-irradiated films of three polymethacrylates with azobenzene side chains exhibiting amorphous, crystalline and liquid-crystalline natures during heat treatment by mean of an ellipsometry and polarized UV-visible spectroscopy. Whereas photogenerated optical anisotropy of amorphous polymer films disappeared above glass transition temperature, the photo-induced anisotropy of films of liquid crystalline and crystalline polymer films was significantly amplified by heat treatment. In case of crystalline polymers amplified optical anisotropy was maintained even at 300°C whereas partial decomposition was observed.

Original languageEnglish
Pages (from-to)141-146
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume559
DOIs
Publication statusPublished - 1999
Externally publishedYes
EventProceedings of the 1999 MRS Spring Meeting - Symposium onLiquid Crystal Materials and Devices - San Francisco, CA, USA
Duration: 1999 Apr 51999 Apr 7

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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