A POLYTHIOPHENE MICROCAVITY LASER

Authors
GRANLUND T THEANDER M BERGGREN M ANDERSSON M RUZECKAS A SUNDSTROM V BJORK G GRANSTROM M INGANAS O
Citation
T. Granlund et al., A POLYTHIOPHENE MICROCAVITY LASER, Chemical physics letters, 288(5-6), 1998, pp. 879-884
Citations number
22
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
288
Issue
5-6
Year of publication
1998
Pages
879 - 884
Database
ISI
SICI code
0009-2614(1998)288:5-6<879:APML>2.0.ZU;2-O
Abstract
We report photopumped lasing in a microcavity device with a polythioph ene layer as the emitter. These microcavity devices are built by joini ng two polymer coated dielectric 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 polyth iophene films and the same polymer in photopumped lasing studies, indi cate that the gain coefficient is 80 +/- 20 cm(-1), and that the excit on concentration is 2 X 10(17) cm(-3) at the lasing transition, well b elow the exciton-exciton recombination level. (C) 1998 Elsevier Scienc e B.V. All rights reserved.