5 research outputs found
Optical Absorption and Luminescence of Epitaxial Films
The optical absorption, emission spectra and luminescence decay kinetics under photoexcitation of (GGG) garnet epitaxial films doped with ions and co-doped with and ions have been investigated. Luminescence of the GGG:Cr films due to → and → transitions in ions have been observed. Increase of the activator ions concentration has an influence on the intensity and decay time of ions photoluminescence. Introduction of the magnesium ions leads to partial transformation of chromium valence state and to the appearance of a broad absorption band with the maximum at 860 nm. The narrow lines with luminescence maxima at 704 and 706 nm have arisen in the highly doped GGG:Cr,Mg films