1. St. Petersburg Academic University, Nanotechnology Center, Russian Academy of Sciences, Khlopin st. 8/3, St. Petersburg, 194021, RussiabNational Research University of Information Technologies, Mechanics and Optics, Natural Science Faculty, Department of
2. National Research University of Information Technologies, Mechanics and Optics, Natural Science Faculty, Department of Higher Mathematics, Kronverksky pr. 49, St. Petersburg, 197101, Russia