1. Chair for Photonics and Optoelectronics, Department of Physics and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität; Amalienstr. 54 80799 München Deutschland
2. Nanosystems Initiative Munich (NIM); Schellingstraße 4 80799 München Deutschland
3. EMAT; University of Antwerp; Groenenborgerlaan 171 B-2020 Antwerp Belgien
4. Department of Chemistry and Center for NanoScience (CeNS); Ludwig-Maximilians-Universität (LMU); Butenandtstraße 5-13 81377 München Deutschland
5. Department of Materials Science and Metallurgy; University of Cambridge; 27 Charles Babbage Rd Cambridge CB3 0FS Großbritannien