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Proceedings Paper

Effective stimulated emission and excited-state absorption cross-section spectra of luminescent polymers
Author(s): Alfons Penzkofer; Wolfgang Holzer; S.-H. Gong; Donal D. C. Bradley; Xiao Long; Andreas Bleyer; Werner J. Blau; A. P. Davey
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Paper Abstract

The effective stimulated emission cross-section spectra of a para-phenylene-vinylene polymer and of two paraphenylene- ethynylene polymers are determined by a fluorescence amplification technique. For these luminescent polymers laser action has been achieved in solution. The effective stimulated emission cross-section spectra are found to be small compared to the stimulated emission cross-section spectra calculated from fluorescence quantum distribution and fluorescence lifetime measurements. The laser excitation of the polymer solutions seems to form lattice relaxed exciton conformations extending over a few monomer units which are thought to be responsible for upper-to-lower-state stimulated emission and lower-to-upper-state (excited-state) absorption.

Paper Details

Date Published: 4 December 1998
PDF: 5 pages
Proc. SPIE 3491, 1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications, (4 December 1998); doi: 10.1117/12.328623
Show Author Affiliations
Alfons Penzkofer, Univ. Regensburg (Germany)
Wolfgang Holzer, Univ. Regensburg (Germany)
S.-H. Gong, Univ. Regensburg (Germany)
Donal D. C. Bradley, Univ. of Sheffield (United Kingdom)
Xiao Long, Univ. of Sheffield (United Kingdom)
Andreas Bleyer, Univ. of Sheffield (United Kingdom)
Werner J. Blau, Univ. of Dublin, Trinity College (Ireland)
A. P. Davey, Univ. of Dublin, Trinity College (Ireland)


Published in SPIE Proceedings Vol. 3491:
1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications
George A. Lampropoulos; Roger A. Lessard, Editor(s)

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