Absorption Spectral study of a dye-Ag nanoparticle mixture by excimer laser irradiation

In this paper, we have presented the absorption spectral the sample of Rodamine 6G dye in methanol with concentration of 0.1 g l-1 mixed with a solution of aggregated silver nanoparticles (with the concentration of 1.34 ×1012cm-3) using Xecl laser (wavelength 308 nm, pulse width 15 ns and 1Hz repetition rate) irradiation. We have demonstration that by irradiating the Xecl laser on the dye-Ag aggregate mixture can change the absorption spectra. In this study the effect of the pulse energy and the exposure time of the Xecl laser on the absorption spectra have been investigated. The experiments were carried out with pulse energies 220,342mj and the exposure times 5, 15 and 30min. It was shown that, irradiation of sample with 15 min exposure time and 220 mj pulse energy is the most optimal condition for increasing the absorption spectra. Our results can be helpful in the choice of active medium concentration of dye lasers.