Lowering the Lasing Threshold by Introducing Cholesteric Liquid Crystal Films to Dye-Doped Cholesteric Liquid Crystal Cell Surfaces

The effect of the introduction of polymer cholesteric liquid crystal (PCLC) films on the threshold of dye-doped cholesteric liquid crystal (CLC) distributed feedback (DFB) cavity lasing has been investigated. A PCLC film used to reflect a pump beam brings about the efficient use of incident energy,...

Full description

Saved in:
Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 44; no. 11R; p. 7966
Main Authors Amemiya, Kazuhiro, Song, Myoung Hoon, Takanishi, Yoichi, Ishikawa, Ken, Nishimura, Suzushi, Toyooka, Takehiro, Takezoe, Hideo
Format Journal Article
LanguageEnglish
Published 01.11.2005
Online AccessGet full text

Cover

More Information
Summary:The effect of the introduction of polymer cholesteric liquid crystal (PCLC) films on the threshold of dye-doped cholesteric liquid crystal (CLC) distributed feedback (DFB) cavity lasing has been investigated. A PCLC film used to reflect a pump beam brings about the efficient use of incident energy, whereas a PCLC film used to reflect the emission contributes to amplifying the stimulated emission. As a result, the cell, in which both PCLC films are introduced, gains about a 60% reduction in the lasing threshold. It is also found that a lasing threshold exists not only for the excitation energy but also for the emission intensity. Namely, the lasing starts to occur at a certain emission level irrespective of the cell structures.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.44.7966