Institution: | 1.St. Petersburg State University, St. Petersburg, 198504, Russia ;2.Institute of Molecule and Crystal Physics, Ufa Research Center, Russian Academy of Sciences, Ufa, Bashkortostan, 450075, Russia ;3.Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences, Moscow, 117393, Russia ;4.International Laser Center, Physics Department, Moscow State University, Moscow, 119899, Russia ; |