Effective stimulated emission and excited-state absorption cross-section spectra of luminescent polymers

Alfons Penzkofer; Wolfgang Holzer; S.-H. Gong; Donal D. C. Bradley; Xiao Long; Andreas Bleyer; Werner J. Blau; A. P. Davey

doi:10.1117/12.328623

4 December 1998 Effective stimulated emission and excited-state absorption cross-section spectra of luminescent polymers

Alfons Penzkofer, Wolfgang Holzer, S.-H. Gong, Donal D. C. Bradley, Xiao Long, Andreas Bleyer, Werner J. Blau, A. P. Davey

Author Affiliations +

Proceedings Volume 3491, 1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications; (1998) https://doi.org/10.1117/12.328623
Event: 1998 International Conference on Applications of Photonic Technology, 1998, Ottawa, Canada

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.

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Alfons Penzkofer, Wolfgang Holzer, S.-H. Gong, Donal D. C. Bradley, Xiao Long, Andreas Bleyer, Werner J. Blau, and A. P. Davey "Effective stimulated emission and excited-state absorption cross-section spectra of luminescent polymers", Proc. SPIE 3491, 1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications, (4 December 1998); https://doi.org/10.1117/12.328623

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