1. Institute of Solid State Physics, Technical University of Berlin, 10623 Berlin, Germany
2. Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland
3. DTU Electro, Department of Electrical and Photonics Engineering, Technical University of Denmark, Kongens Lyngby 2800, Denmark
4. NanoPhoton − Center for Nanophotonics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
5. Center for Macroscopic Quantum States (bigQ), Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark