Lasing in substituted polythiophene between dielectric mirrors
1999 (English)In: Synthetic metals, ISSN 0379-6779, Vol. 102, no 1-3, 1038-1041 p.Article in journal (Refereed) Published
We report photopumped lasing in a microcavity device with a polythiophene layer as emitter. The microcavity is made of a polymer film between two dielectric Bragg reflecting mirrors (DBR). The:microcavity devices is built by joining two polymer coated DBR mirrors at elevated temperature. When photopumping the film,a lasing threshold is observed at 120 nJ/cm(2). Comparative studies with fast pump-probe spectroscopy of thin polythiophene films, and the same polymer in photopumped lasing studies, indicate that the gain coefficient is 80 +/- 20 cm(2) and that the exciton concentration is 2X10(17) cm(2) at the lasing transition, well below the exciton-exciton recombination level.
Place, publisher, year, edition, pages
Elsevier , 1999. Vol. 102, no 1-3, 1038-1041 p.
laser; microcavity; photopumped; polymer; polythiophene
National CategoryEngineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-74868DOI: 10.1016/S0379-6779(98)00227-6ISI: 000081056400084OAI: oai:DiVA.org:liu-74868DiVA: diva2:496811