[1] SB RAS, Lab Opt Mat & Struct, Inst Semicond Phys, Novosibirsk 630090, Russia
[2] SB RAS, Inst Inorgan Chem, Novosibirsk 630090, Russia
[3] SB RAS, Lab Nanodiagnost & Nanolithog, Inst Semicond Phys, Novosibirsk 630090, Russia
[4] Novosibirsk State Univ, Dept Phys, Novosibirsk 630090, Russia