1. Ioffe Physical Technical Institute of the Russian Academy of Science, Politekhnicheskaya 26, St. Petersburg 194021, Russia
2. Institute of Physics, Nanotechnology and Telecommunications, St. Petersburg State Polytechnical University, Politekhnicheskaya 29, St. Petersburg 195251, Russia
3. St. Petersburg Academic University, Nanotechnology Centre, Khlopina 8/3, 194021 St. Petersburg, Russia
4. ITMO University, International laboratory “Laser Systems”, Kronverkskiy pr. 49, 197101 St. Petersburg, Russia