Amplified spontaneous emission from a soluble thiophene-based oligomer

Anni, M.; Gigli, G.; Cingolani, R.; Zavelani-Rossi, M.; Gadermaier, C.; Lanzani, G.; Barbarella, G.; Favaretto, L.
April 2001
Applied Physics Letters;4/30/2001, Vol. 78 Issue 18, p2679
Academic Journal
Optical gain is demonstrated, through pump-probe measurement, in a spin-coated film of a quinquethiophene-S,S-dioxide. The temporal evolution of the gain as a function of the pump intensity shows a progressive shortening of the lifetime as the pump intensity increases. The photoluminescence spectra show line narrowing for excitation intensity higher than 960 μJ cm[sup -2]. From these measurements, we conclude that oligothiophene-S,S-dioxides are valuable candidates for thin-film organic light amplifier and lasers. © 2001 American Institute of Physics.


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