Alexander A. KaplyanskiiCorresponding Member of Russian Academy of Sciences, Professor,
Head of Solid State Optics Department,
Head of the Laboratory of Spectroscopy of Solid State,
Professor at Solid State Physics Department, Faculty of
Physics, St.Petersburg State University.
A.F.Ioffe Physico-Technical Institute,
26 Politekhnicheskaya ul.,
St. Petersburg 194021, Russia