Open AccessMicrochip Random Laser based on a disordered TiO_2-nanomembranes arrangement
Author(s) -
C. Tolentino Dominguez,
Y. Lacroute,
Denis Chaumont,
M. Sacilotti,
Cid B. de Araújo,
Anderson S. L. Gomes
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.017380
Subject(s) - materials science , lasing threshold , random laser , rhodamine 6g , laser , optics , refractive index , optoelectronics , photonics , substrate (aquarium) , wavelength , oceanography , physics , fluorescence , geology
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.