1. Institute of Applied Physics, Abbe Center of Photonics; Friedrich-Schiller-Universität Jena; Max-Wien-Platz 1, 07743 Jena Germany
2. Fraunhofer Gesellschaft; Headquarters; Hansastraße 27c, 80686 München Germany
3. Fraunhofer Institute for Applied Optics and Precision Engineering; Albert-Einstein-Straße 7; 07745 Jena Germany