Effect of Nano-Gold Particle Addition on the Optical and Spectral Properties of Rhodamine 6G Dye as an Active Laser Medium

The Rhodamine 6G fluorescent dye, It was dissolved at a concentration in ethanol of 6*10-6 M, was investigated an active laser medium in this work, and its optical and spectral properties were investigated. The fluorescent Rhodamine 6G dye, which was dissolved in ethanol at a concentration 6*10-6 M, was investigated an active laser medium in this work, and its optical and spectral properties were investigated. The chemical reduction process was also used to create gold nanoparticles at concentration of 0.01 M. Three concentrations of gold nanoparticles (2.5, 5, and 7.5%) w/v were added to the Rhodamine 6G dye solution in order to examine how they affected the dye's optical and spectral characteristics. Optical and spectral properties Rhodamine 6G dye sample were analyzed both before to following the addition of gold nanoparticles. After adding gold nanoparticle the dye, the results indicated a shift toward lower wavelengths (red shift) and an increase in optical parameters, with the exception of transmittance. Fluorescence intensity, radiative lifetime, quantum yield, stoke shift, and fluoresce cent lifetime were among the spectrum characteristics. The relative fluorescence intensity dropped after the nanoparticles were applied.