1. Department of Energy and Process Engineering, Norwegian University of Science and Technology, Kolbjørn Hejes Vei 1B, No-7034 Trondheim, Norway
2. Department of Materials Science and Engineering, Norwegian University of Science and Technology, Sem Sælands Vei 12, 7491 Trondheim, Norway
3. University College London, Gower St., London, England
4. Department of Physics, Norwegian University of Science and Technology, Høgskoleringen 5, 7491 Trondheim, Norway
5. ATLA Lasers AS, Richard Birkelands Vei 2B, 7491 Trondheim, Norway
6. NTNU Nanolab, Sem Sælands Vei 14, 7491 Trondheim, Norway