Photoacoustic study on the photostability of polymethyl methacrylate films doped with Rhodamine 6G-Rhodamine B dye mixture system

Abstract

The photosensitivity of dye mixture-doped polymethyl methacrylate (PMMA) films are investigated as a function of laser power, concentration of the dyes, modulation frequency and the irradiation wavelength. Energy transfer from a donor molecule to an acceptor molecule affects the emission output of the dye mixture system. Photosensitivity is found to change with changes in donor-acceptor concentrations. PMMA samples doped with the dye mixture are found to be more photosensitive when the dyes are mixed in the same proportion. © 2005 IOP Publishing Ltd.