Plasmonic enhancement of Ag NPs in a different active media

Improvement of the laser output of the laser active media (dye lasers) through the study of the emission spectrum of plasmonic resulting from using a laser beam with a different energies, in addition to study the spectrum that resulting from the interaction of the exciton with the plasmon and its effect on the laser output. It was used (RhB dye) with different concentrations, and then studied the absorption spectrum of these samples by using UV-VIS spectrometer, and then the emission spectrum by using fluorescence spectroscopy. It was used a better concentration of dye (1*10^-5 M) to mix with different concentrations of Ag NPs that have been prepared by the ablation method. To get a different concentrations of Ag NPs it was changed the pulse number (500, 600, 700, 800, 900) p and keep the energy constant at (600 mJ), it will play a major role in changing the emission and the absorption spectrum properties. It was found a strong dependence of the emission characteristics (the emission intensity, threshold for lasing) on the concentration of Ag NPs. (paper)