0000000000424252

AUTHOR

Cid B. De Araújo

showing 2 related works from this author

Microchip Random Laser based on a disordered TiO2-nanomembranes arrangement

2012

International audience; 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 TiO2 nanomembranes (TiO2-NM) supported on a glass substrate. The feedback mechanism for laser action is due to the multiple scattering of light by TiO2-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.

Materials sciencePhysics::Optics02 engineering and technology01 natural sciencesLight scatteringlaw.inventionRhodamine 6Gchemistry.chemical_compoundCondensed Matter::Materials ScienceOpticslaw0103 physical sciencesSCATTERING010306 general physicsDye laserRandom laserbusiness.industry021001 nanoscience & nanotechnologyLaserAtomic and Molecular Physics and OpticschemistryOptoelectronicsPhotonics0210 nano-technologybusinessRefractive indexLasing threshold
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Random Laser Based on TiO2–Nanomembranes

2012

We demonstrated directional random laser emission from a dye-doped polymer film in the presence of a scattering medium consisting of TiO 2 nanomembranes. Evidence for coexistence of extended and localized modes are presented.

Dye laserRandom laserMaterials sciencebusiness.industryScatteringScanning electron microscopePhysics::OpticsLight scatteringNanomaterialsCondensed Matter::Materials ScienceCondensed Matter::SuperconductivityOptoelectronicsStimulated emissionPhotonicsbusinessConference on Lasers and Electro-Optics 2012
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