title: Tunable distributed feedback lasing with a threshold in the nanojoule range in an organic guest-host polymeric waveguide.
abstract: Tunable distributed feedback lasing was achieved in a guest-host polymeric waveguide using holographic dynamic gratings. Tris(8-quinolinolato)aluminum (Alq) as a host and 4-(dicyanomethylene)-2-methyl-6-(4-dimethylaminostyryl)-4H-pyran (DCM) as a guest emitter were dispersed in poly(N-vinyl carbazole) (PVCz) matrix. Emission of both the TE(0) and the TM(0) modes was measured. Effective energy transfer from PVCz to DCM through Alq assisted in the reduction of the threshold of laser emission. The threshold of 38 nJ/pulse was measured for first-order lasing and that of 53 nJ/pulse for second-order lasing.
authors.affiliation: Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo, Kyoto 606-8585, Japan. tsutsumi@kit.ac.jp
authors.forename: Naoto
authors.initials: N
authors.lastname: Tsutsumi
authors.forename: Arata
authors.initials: A
authors.lastname: Fujihara
authors.forename: Daisuke
authors.initials: D
authors.lastname: Hayashi