Open Access1Low threshold random lasing in dye-doped silica nano powders
Author(s) -
Sara Garcı́a-Revilla,
Marcos Zayac,
Rolindes Balda,
M. Al-Saleh,
David Lévy,
J. Fernández
Publication year - 2009
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.013202
Subject(s) - random laser , lasing threshold , rhodamine 6g , materials science , dye laser , slope efficiency , doping , laser , nanoparticle , amplified spontaneous emission , nano , stimulated emission , optics , optoelectronics , fiber laser , nanotechnology , fluorescence , composite material , wavelength , physics
Random laser action is demonstrated in two kinds of powder samples containing rhodamine 6G (Rh6G) doped SiO2 nanoparticles which are either directly dispersed within pure silica particles or embedded in a silica gel matrix which is subsequently ground. Both organic-inorganic hybrid materials present different laser thresholds and emission features which are systematically studied and compared. The dependence of the emission kinetics, emission spectrum, random laser threshold and slope efficiency on the dye doped nanoparticles concentration is investigated in both cases. We also explore if the incorporation of additional TiO2 scatterers could enhance the random laser operation of the studied systems.