1. Otto-Schott-Institute of Materials Research, Jena University, Fraunhoferstr. 6, 07743 Jena, Germany
2. Otto-Schott-Institute of Materials Research, Jena University, Löbdergraben 32, 07743 Jena, Germany
3. Institute of Optics and Quantum Electronics, Jena University, Max-Wien-Platz 1, 07743 Jena, Germany
4. Helmholtz-Institute Jena, Fröbelstieg 3, 07743 Jena, Germany