1. Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany and Institute of Physics and Technical Education, Karlsruhe University of Education, 76133 Karlsruhe, Germany
2. Laboratory for Optics and Biosciences, Ecole Polytechnique, CNRS, INSERM, Institut Polytechnique de Paris, Palaiseau, France and UFR Sciences, Université Paris-Saclay, Saint-Aubin, France
3. Thorlabs GmbH, Münchner Weg 1, 85232 Bergkirchen, Germany
4. Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany
5. Institute of Physics and Technical Education, Karlsruhe University of Education, 76133 Karlsruhe, Germany
6. Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany and Institute of Nanotechnology, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany