1. Department of Nanophotonics and Metamaterials
2. ITMO University
3. St Petersburg 197101
4. Russia
5. Joint Institute for High Temperatures
6. Russian Academy of Sciences
7. Moscow 125412
8. Moscow Institute of Physics and Technology
9. Ruhr-Universitat Bochum
10. Nanotechnology Department
11. Laser Zentrum Hannover e.V.
12. Hannover D-30419
13. Germany
14. Federal Scientific Research Centre Crystallography and Photonics of Russian Academy of Sciences
15. Moscow 142190
16. Leibniz University Hannover
17. Institute of Quantum Optics