Quasilocal states in indium-activated alkali-halide crystals
Danilov V. P. , Zhekov V. I. , Murina T. M. , Nagli L. E., Prokhorov A. M.
Two-step spectroscopy is used to observe absorption from the lower excited state of In+ ions in alkali-halide crystals. This absorption is attributed to the presence of quasilocal states of the activator in the conduction band of the crystal. The positions of the quasilocal levels relative to the ground state are estimated.