Author/Authors :
Granlund، نويسنده , , Thomas and Theander، نويسنده , , Mathias and Berggren، نويسنده , , Magnus L. Andersson، نويسنده , , Mats and Ruzeckas، نويسنده , , Arvydas and Sundstrِm، نويسنده , , Villy and Bjِrk، نويسنده , , Gunnar and Granstrِm، نويسنده , , Magnus and Inganنs، نويسنده , , Olle، نويسنده ,
Abstract :
We report photopumped lasing in a microcavity device with a polythiophene layer as the emitter. These microcavity devices are built by joining two polymer coated dielectric mirrors at elevated temperature. When photopumping the film, a lasing threshold is observed at 120 nJ/cm2. 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−1, and that the exciton concentration is 2×1017 cm−3 at the lasing transition, well below the exciton–exciton recombination level.
