TITLE

Robust organic lasers comprising glassy-cholesteric pentafluorene doped with a red-emitting oligofluorene

AUTHOR(S)
Wei, Simon K. H.; Chen, Shaw H.; Dolgaleva, Ksenia; Lukishova, Svetlana G.; Boyd, Robert W.
PUB. DATE
January 2009
SOURCE
Applied Physics Letters;1/26/2009, Vol. 94 Issue 4, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Doped with a red-emitting oligofluorene, fluid and glassy cholesteric liquid crystal (CLC) films are characterized by similar lasing thresholds and efficiencies. With picosecond excitations the output from a glassy CLC laser is temporally stable, but that from a fluid CLC laser decays with time. The difference in stability is attributable to external perturbations on supramolecular structure in the fluid but not the solid state, such as heating through optical pumping, light-induced pitch dilation, and laser-induced flow.
ACCESSION #
36434997

 

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