1. Institute for Applied Laser, Photonics and Surface Technologies, BFH, Bern University of Applied Sciences, Quellgasse 21, Biel/Bienne 2502, Switzerland
2. Laboratory for Photovoltaics and Thin Film Electronics, EPFL, École Polytechnique Fédérale de Lausanne, Rue de la Maladière 71b, Neuchâtel 2000, Switzerland
3. Laboratory for Mechanics of Materials and Nanostructures, Empa, Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, Thun 3602, Switzerland
4. Nanoelectronics and Photonics Group, Department of Electronic Systems, Norwegian University of Science and Technology, Trondheim 7034, Norway
5. TOFWERK AG, Schorenstrasse 39, Thun 3645, Switzerland