1. St. Petersburg State University
2. St. Petersburg
3. 199034 Russia
4. Institute of Macromolecular Compounds
5. Russian Academy of Sciences
6. 199004 Russia
7. St. Petersburg National Research University of Information Technologies
8. Mechanics and Optics (ITMO University)
9. 197101 Russia
10. Department of Physics
11. LUT University
12. 53851 Lappeenranta
13. Finland