1. NanoLund and Solid State Physics, Lund University, Box 118, 22100 Lund, Sweden
2. Physics, Faculty of Science and Engineering, Åbo Akademi University, FI-20500 Turku, Finland
3. AlignedBio AB, Medicon Village, Scheeletorget 1, 223 63 Lund, Sweden
4. Department of Physics, Chalmers University of Technology, 41296 Gothenburg, Sweden