1. Medical Physics, Institute of Physics, Martin-Luther-University Halle-Wittenberg, 06120 Halle (Saale), Germany
2. Centre for Innovation Competence SiLi-Nano, Martin-Luther-University Halle-Wittenberg, 06120 Halle (Saale), Germany
3. Hochschule Bremen, Neustadtswall 30, 28199 Bremen, Germany and Laser Zentrum Hannover e.V., Hollerithallee 8, 30419 Hannover, Germany
4. Interdisciplinary Center of Material Science, Martin-Luther-University Halle-Wittenberg, 06120 Halle (Saale), Germany
5. Group MD, Institute of Physics, Martin-Luther-University Halle-Wittenberg, 06120 Halle (Saale), Germany