Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9778027 | Journal of Non-Crystalline Solids | 2005 | 4 Pages |
Abstract
Monodisperse latex spheres were obtained by a surfactant free styrene polymerization method and used to obtain colloidal crystals by controlled centrifugation settling. Silica inverse opals were then prepared by using the colloidal crystals as templates and TEOS/ethanol solution. The inverse opals were infiltrated with Rhodamine 6G and laserlike emission was observed at 590Â nm under 532Â nm pump wavelength. The data show line narrowing of the dye fluorescence and a laser threshold of â¼0.1Â mJ/pulse. Local-field effects and light scattering due to structural defects are the main mechanisms contributing to generation of the laser-action observed.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Márcio A.R.C. Alencar, Glauco S. Maciel, Cid B. de Araújo, Roberto Bertholdo, Younes Messaddeq, Sidney J.L. Ribeiro,