title: Efficient organic distributed feedback lasers with imprinted active films.
abstract: We report on the fabrication of efficient organic distributed feedback (DFB) lasers with thermally-nanoimprinted active films, emitting between 565 and 580 nm. The use of thermal-NIL has allowed, as opposed to room temperature or solvent-assisted techniques, high grating quality and excellent modulation depth. The 155°C heat exposure of the NIL process, does not significantly affect the thermal and optical properties of the active material (polystyrene films doped with a perylenediimide derivative). These devices combine a simple and low-cost preparation method with good laser characteristics, i.e. thresholds of 1 μJ/pulse, single-mode emission with linewidths below 0.2 nm and photostability half-lives of ~ 10⁵ pump pulses under ambient conditions. In comparison to more standard DFBs with gratings on the substrate, their fabrication is much easier, while they show a similar laser performance.
authors: Instituto Universitario de Materiales de Alicante and Unidad Asociada UA-CSIC, Universidad de Alicante, Alicante 03080, Spain.
authors: Manuel G
authors: MG
authors: Ramirez
authors: Pedro G
authors: PG
authors: Boj
authors: Victor
authors: V
authors: Navarro-Fuster
authors: Igor
authors: I
authors: Vragovic
authors: José M
authors: JM
authors: Villalvilla
authors: Ibon
authors: I
authors: Alonso
authors: Vera
authors: V
authors: Trabadelo
authors: Santos
authors: S
authors: Merino
authors: María A
authors: MA
authors: Díaz-García