1. Electron Microscopy Unit Hamburg University of Technology Eissendorfer Strasse 42 21073 Hamburg Germany
2. Institute of Materials Research Helmholtz‐Zentrum Geesthacht Centre for Materials and Coastal Research Max‐Planck‐Strasse 1 21502 Geesthacht Germany
3. Institute of Optical and Electronic Materials Hamburg University of Technology Eissendorfer Strasse 38 21073 Hamburg Germany
4. Interdisciplinary Nanoscience Center (iNANO) and iMAT Aarhus University Gustav Wieds Vej 14 Aarhus 8000 Denmark
5. Centre for Nano Optics University of Southern Denmark Campusvej 55 Odense 5230 Denmark
6. Department of Physics and Nanotechnology Aalborg University Skjernvej 4A Aalborg 9220 Denmark
7. ITMO University 49 Kronverskii Avenue Saint Petersburg 197101 Russia