Low-threshold amplified spontaneous emission in thin films of poly(tetraarylindenofluorene)

Fŕd́ric Laquai*, Panagiotis E. Keivanidis, Stanislav Baluschev, Josemon Jacob, Klaus Müllen, Gerhard Wegner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


We report on amplification of blue light (469 nm) via amplified spontaneous emission in asymmetric planar waveguides of a fully arylated polyindenofluorene derivative. A very low threshold value of about 3 μJ cm2 (∼375 W cm2) for amplification of light has been demonstrated by pumping the waveguides at 3.0 eV (410 nm) with a stripe shape excitation beam. Moderate gain coefficients up to 21 cm-1 and loss coefficients around 6 cm-1 have been measured. All measurements were performed under ambient conditions. No sample degradation could be observed which testifies to the excellent stability of the material against photodegradation.

Original languageEnglish (US)
Article number261917
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Issue number26
StatePublished - 2005
Externally publishedYes

Bibliographical note

Funding Information:
The authors acknowledge financial support by the German Ministry of Science and Education, Project OLAS, 13N8168. One of the authors (F.L.) wishes to thank the Fonds der Chemischen Industrie for providing a Kekulé scholarship. The authors acknowledge experimental assistance from H. Menges.

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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