title: Ultrafast random laser emission in a dye-doped silica gel powder.
abstract: We report efficient random lasing in a ground powder of a novel solid-state material based on silica gel containing SiO(2) nanoparticles embedding rhodamine 6G (Rh6G) dye. Basic properties of random lasing such as emission kinetics, emission spectrum, and threshold of stimulated emission are investigated by using real-time spectroscopy. The laser-like emission dynamics can be accurately described by a light diffusive propagation model. The device behavior is close to a conventional ultrafast Q-switched laser, which is an interesting fact aimed to further applications.
authors.affiliation: Departamento Física Aplicada I, Escuela Técnica Superior de Ingeniería, Alda. Urquijo s/n 48013 Bilbao, Spain.
authors.forename: Sara
authors.initials: S
authors.lastname: García-Revilla
authors.forename: Joaquin
authors.initials: J
authors.lastname: Fernández
authors.forename: Maria A
authors.initials: MA
authors.lastname: Illarramendi
authors.forename: Begoña
authors.initials: B
authors.lastname: García-Ramiro
authors.forename: Rolindes
authors.initials: R
authors.lastname: Balda
authors.forename: Hongtao
authors.initials: H
authors.lastname: Cui
authors.forename: Marcos
authors.initials: M
authors.lastname: Zayat
authors.forename: David
authors.initials: D
authors.lastname: Levy
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005782:Gels / Q000737:chemistry; D007834:Lasers; D008962:Models, Theoretical; D053758:Nanoparticles / Q000737:chemistry*; D011208:Powders; D012235:Rhodamines / Q000737:chemistry*; D012542:Scattering, Radiation; D012822:Silicon Dioxide / Q000737:chemistry*
chemical_list: D005782:Gels; D011208:Powders; D012235:Rhodamines; C026188:rhodamine 6G; D012822:Silicon Dioxide