Spectroscopy of tetrahedrally coordinated V3+ in oxide crystals

Among several investigated V3+-doped oxide crystals V3+:LiGaO2 exhibits the most intense broad band emission between 1400nm and 2000nm with lifetimes of 89μsec and 11μs at 12K and 300K, respectively. The decrease in the lifetime is mainly caused by nonradiative decay processes, the quntaum efficiency at room temperature is about 15%. In LiAlO2 and SrAl2O4 the quenching process is even stronger, because of the smaller energy gap between the participating levels.