1. Light Technology InstituteKarlsruhe Institute of Technology Engesserstrasse 13 76131 Karlsruhe Germany
2. InnovationLab Speyerer Strasse 4 69115 Heidelberg Germany
3. Department of Chemistry and BiochemistryUniversity of Bern Freiestrasse 3 CH‐3012 Bern Switzerland
4. Centre for Advanced MaterialsHeidelberg University Im Neuenheimer Feld 225 69120 Heidelberg Germany
5. Institute of Microstructure TechnologyKarlsruhe Institute of Technology Hermann‐von‐Helmholtz‐Platz 1 76344 Eggenstein‐Leopoldshafen Germany