Spectroscopic characterization of semiconductor doped colour filter glasses

Fresh and photodarkened Schott RG645 and RG665 colour filter glasses are investigated in detail by absorption and emission spectroscopy. The CdS_xSe_1-x volume fraction is deduced from absorption measurements applying Maxwell Garnett theory. The cluster size is determined by Rayleigh scattering measurements. Groundstate and excited-state absorption cross-sections as well as the number density of interacting states are determined from nonlinear transmission measurements using a femtosecond dye laser. The temporal absorption recovery is studied. The fluorescence quantum distributions, quantum yields, and degrees of polarization are determined. A relaxation scheme in an energy band diagram is presented and dynamic parameters are deduced.