The photoluminescent spectra of CaO and MgO oxides doped with rare-earth ions are studied. Photoluminescence stimulated by IR light at room temperature is observed for the first time. Optically stimulated luminescence in Ca(Mg)O:Eu,Sm for different concentrations of dopants after exposure to UV radiation (?=250 nm) and radiation with ?=488 nm are investigated. A physical model to explain luminescence and stimulated luminescence is proposed. Materials based on alkalineearth oxides activated by rare-earth ions are suitable for multiple rewriting of information.
Vasyliy G. Kravets,
"Oxides doped with rare-earth ions as a memory medium for rewritable optical information recording," Optical Engineering 38(9), (1 September 1999). http://dx.doi.org/10.1117/1.602199