1. Otto-Schott-Institute
of Materials Research (OSIM), Friedrich-Schiller-University of Jena, Löbdergraben
32, 07743 Jena, Germany
2. Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, 07745 Jena, Germany
3. Institute
of Electronic and Sensor Materials, TU Bergakademie Freiberg, Gustav-Zeuner-Straße
3, 09596 Freiberg, Germany