Study on laser action from UV-curable chiral nematic liquid crystals

Seiichi Furumi, Shiyoshi Yokoyama, Akira Otomo, Shinro Mashiko

Research output: Contribution to journalConference article

9 Citations (Scopus)

Abstract

This paper describes the study on laser action from UV-curable chiral nematic liquid crystals (CLCs) doped with a fluorescent dye before and after photopolymerization of CLC host. When an optically active agent without crosslinkable moiety was doped in a UV-curable nematic liquid crystal, the laser action from the CLC cell was quite different before and after photopolymerization. Before the polymerization, optically pumping of dye-doped CLC cells with a linearly polarized laser beam gave rise to the laser emission with circular polarization at the band edge of CLC reflection as a consequence of the internal distributed feedback effect. Successively, photopolymerization of the CLC with 365 nm light brought about the thorough disappearance of the CLC reflection band probably due to the phase separation leading to the emergence of amplified spontaneous emission of fluorescent dye by optically pumping. In contrast, the dye-doped CLC cell including a crosslinkable agent with a cholesteryl residue enabled the mirrorless laser action after photopolymerization. This is because the selective reflection band of CLC host was retained by the planar structure of cholesteric polymer network.

Original languageEnglish
Pages (from-to)423-427
Number of pages5
JournalThin Solid Films
Volume438-439
DOIs
Publication statusPublished - Aug 22 2003
Externally publishedYes
EventThe 5th International Conference on Nano-Molecular Electronics - Kobe, Japan
Duration: Dec 10 2002Dec 12 2002

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All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Surfaces and Interfaces

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