Photoacoustic study on photobleaching of Rhodamine 6G doped in poly(methyl methacrylate)

Abstract

The photobleaching of the lasing dye Rhodamine 6G embedded in the solid\nmatrix poly(methyl methacrylate) was investigated using a photoacoustic technique.\nChopped laser radiation from an argon ion laser at four different wavelengths was used for\nthe study. Experimental results indicate that the photobleaching rate is directly proportional\nto the incident laser power while it decreases with increase in concentration of the dye\nmolecules. In the present case we have not observed any dependence of photobleaching on\nthe chopping frequency. One-photon absorption is found to be responsible for the\nphotobleaching of the dye within the selected range of laser power