OXIDES DOPED WITH RARE-EARTH IONS FOR REVERSIBLE OPTICAL-DATA RECORDING

Photoluminescence spectra of Ca(Mg)O : Eu, Sm oxides of alkaline-earth metals doped with ions of rare-earth elements, were studied. Photolum inescence stimulated in these materials at room temperature with IR ra diation was observed for the first time. The stimulated photoluminesce nce in Ca(Mg)O : Eu, Sm was studied for various impurity concentration s. The samples were preliminarily exposed to UV radiation at wavelengt hs of 250 and 488 nm. A physical model of the mechanism of photolumine scence and stimulated photoluminescence in the materials under study i s proposed. It is shown that alkali-earth oxides doped with rare-earth ions can be used for repeated optical data recording.