title: Microchip Random Laser based on a disordered TiO2-nanomembranes arrangement.
abstract: We developed a new scheme for obtaining coherent random lasing based on a chip consisting of a polymer film doped with Rhodamine 6G, having as scatterers butterfly-like TiO(2) nanomembranes (TiO(2)-NM) supported on a glass substrate. The feedback mechanism for laser action is due to the multiple scattering of light by TiO(2)-NM rather than provided by localized variations of the refractive index in the polymer film. The above-threshold multiple spikes signature indicative of random laser emission with coherent feedback is confirmed. As nanomembranes are foreseen as new MEMS/NEMS building blocks, a new generation of combined active/passive photonic devices can be envisaged.
authors.affiliation: Departamento de Física, Universidade Federal de Pernambuco, Recife, PE, 50670-901, Brazil. christian@df.ufpe.br
authors.forename: Christian Tolentino
authors.initials: CT
authors.lastname: Dominguez
authors.forename: Yvon
authors.initials: Y
authors.lastname: Lacroute
authors.forename: Denis
authors.initials: D
authors.lastname: Chaumont
authors.forename: Marco
authors.initials: M
authors.lastname: Sacilotti
authors.forename: Cid B
authors.initials: CB
authors.lastname: de Araújo
authors.forename: Anderson S L
authors.initials: AS
authors.lastname: Gomes