1. Science Institute and Faculty of Physical Sciences
2. University of Iceland VR-III
3. 107 Reykjavík
4. Iceland
5. Department of Natural Sciences
6. Department of Materials and Nanophysics
7. Royal Institute of Technology (KTH)
8. SE-16440 Kista
9. Sweden
10. Department of Physics
11. University ITMO
12. St. Petersburg
13. 197101 Russia
14. Department of Applied Physics