1. Chair of Experimental Physics and Functional Materials 1 , BTU Cottbus-Senftenberg, Cottbus, Germany
2. Institute for Semiconductor Engineering (IHT), University of Stuttgart 2 , Stuttgart, Germany
3. IHP-Leibniz-Institut für Innovative Mikroelektronik 3 , Frankfurt, Germany
4. Chair of Computer Engineering 4 , BTU Cottbus-Senftenberg, Cottbus, Germany
5. 4th Physics Institute, University of Stuttgart 5 , Stuttgart, Germany
6. Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy 6 , Berlin, Germany