Active medium for dye-lasers based on a matrix of porous Al2O3 with Ag nanoparticles

Abstract

In this work the luminescent properties of anodized alumina oxide films with high-ordered structure, doped with Rhodamine dyes molecules were investigated. The fluorescence quantum yield in alumina oxide films of Rhodamine 6 G was equal to Ffl = 0.78 and Rhodamine B was equal to Ffl = 0.54. Stimulated emission of the Rhodamine 6G and Rhodamine B molecules in the film of anodic aluminum oxide is observed. The presence of Ag NPs in porous alumina leads to the decreasing of the dye generation threshold. For Rhodamine B plasmon effect of silver NPs on the stimulated emission is lower than for Rhodamine 6G. This may be due to the smaller overlap of absorption and fluorescence spectra of the dye and Ag NPs in the matrix of the alumina.