1. Experimental Physics VI
2. Julius-Maximilian University of Würzburg
3. Am Hubland
4. 97074 Würzburg
5. Germany
6. Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP) and Institute for Applied Physics
7. Technische Universität Dresden
8. 01187 Dresden
9. Institute for Materials Research (IMO-IMOMEC)
10. Hasselt University
11. 3590 Diepenbeek
12. Belgium