1. Centre
for Innovation Competence SiLi-nano, Martin-Luther-University Halle-Wittenberg, Karl-Freiherr-von-Fritsch-Straße
3, 06120 Halle (Saale), Germany
2. International Max Planck Research School for Science and Technology of Nanostructures, Weinberg 2, 06120 Halle (Saale), Germany
3. Interdisciplinary
Center of Material Science, Martin-Luther-University Halle-Wittenberg, Heinrich-Damerow-Straße
4, 06120 Halle (Saale), Germany
4. Institute for Physics of Microstructures of the Russian Academy of Sciences (IPM RAS), Academicheskaya
Street 7, 603950 Nizhniy Novgorod, Russian Federation
5. Department
of Nanophotonics and Metamaterials, ITMO University, Birzhevaya
liniya 14, 199034 St. Petersburg, Russia
6. Department
of Physics and Mathematics, University of Eastern Finland, Yliopistokatu
7, 80101, Joensuu, Finland