1. aHelmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
2. bInstitute of Applied Physics, Friedrich-Schiller-University Jena, Albert-Einstein-Straße 15, 07745 Jena, Germany
3. cFraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Straße 7, 07745 Jena, Germany