1. Institute of Applied Physics and Abbe Center of Photonics Friedrich-Schiller-University Jena; Albert-Einstein-Str. 15 07745 Jena Germany
2. Institute of Physical Chemistry and Abbe Center of Photonics Friedrich-Schiller-University Jena Helmholtzweg 4; 07743 Jena Germany
3. Leibniz Institute of Photonic Technology Jena IPHT; Albert-Einstein-Straße 9 07745 Jena Germany
4. Fraunhofer Institute for Applied Optics and Precision Engineering; Albert-Einstein-Str. 7 07745 Jena Germany