Ultrafast response of polymers with large optical nonlinearity

Takayoshi Kobayashi, Masayuki Yoshizawa

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Ultrafast optical response in polydiacetylenes and polythiophense was investigated by femtosecond time-resolved absorption spectroscopy. Several nonlinear optical processes, i.e. hole burning, Raman gain, and induced-frequency shift, were observed and the third-order nonlinear susceptibilities were determined. The ultrafast relaxation dynamics following after the photoexcitation was investigated and the formation and relaxation of self-trapped exciton was observed. A model of the relaxation processes of excitons in conjugated polymers is proposed. The short life of STE and difference between fluorescent and nonfluorescent polymers are explained.

Original languageEnglish
Pages (from-to)83-88
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
Issue number1
Publication statusPublished - 1992 Jun 1
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics


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