1. Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk 90, 630090, Russia
2. Technical Centre, Institute of Semiconductor Physics, SB RAS, Novosibirsk 90, 630090, Russia
3. Department of General and Inorganic Chemistry, Volyn State University, Voli Ave 13, Lutsk 43025, Ukraine