1. Institute of Nanotechnology (INT); Karlsruhe Institute of Technology (KIT); 76128 Karlsruhe Germany
2. Institute of Applied Physics (APH); Karlsruhe Institute of Technology (KIT); 76128 Karlsruhe Germany
3. Carl Zeiss AG; Carl Zeiss Promenade 10 07745 Jena Germany
4. Carl Zeiss AG; Carl-Zeiss-Straße 22 73447 Oberkochen Germany