1. Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany
2. Kirchhoff Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
3. Department of Chemistry, University of Cologne, Luxemburger Straße 116, 50939 Köln, Germany
4. Fourth Physics Institute and Stuttgart Research Center of Photonic Engineering, University of Stuttgart, 70569 Stuttgart, Germany
5. Department of Chemistry & Biochemistry, Biodesign Institute, Arizona State University, Tempe, Arizona 85287-5601, United States