Dual ring laser emission of conducting polymers in microcapillary structures

We have demonstrated photopumped multimode laser emission from cylindrical microcavities of conducting polymer thin films, which were formed by deposition on the inside surface of the glass microcapillary with capillary action. The laser emission was characterized by narrow emission lines and a well-defined excitation threshold. We also fabricated dual ring cavities on inner and outer surfaces of microcapillaries, and laser emission from both sides of capillaries was observed by photopumping with one excitation source. Fabricating two cylindrical microcavities on inner and outer surfaces of the microcapillary by utilizing a different sort of conducting polymers, dual laser emissions, blue and red in color, were obtained concurrently. (C) 2005 American Institute of Physics.