Li-impurity effect in optical spectra of KTaO3:Er3+ crystals

Аннотация

The f–f absorption and emission spectra of Er³⁺ impurities were observed and identified in KTaO₃ and K_{1 – x}Li_xTaO₃ single crystals. It was shown that Li off-centers related random fields markedly influence intensity, width and position of zero-phonon lines. The detail analysis of the absorption spectra obtained allowed one to determine energies of the Stark sublevels of excited states for Er³⁺ dominant centers of noncubic symmetry.