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: Chapter in Book/Report/Conference proceedingConference contribution

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
Title of host publicationMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Pages141-146
Number of pages6
Volume559
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

Other

OtherProceedings of the 1999 MRS Spring Meeting - Symposium onLiquid Crystal Materials and Devices
CitySan Francisco, CA, USA
Period99/4/599/4/7

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Kidowaki, M., Fujiwara, T., Morino, S., Ichimura, K., & Stumpe, J. (1999). In-situ observation of thermal amplification of photogenerated optical anisotropy of films of azobenzene polymers. In Materials Research Society Symposium - Proceedings (Vol. 559, pp. 141-146). Materials Research Society.