1. TOFWERK AG, Schorenstrasse 39, 3645 Thun, Switzerland
2. Institute for Applied Laser, Photonics and Surface Technologies, BFH, Bern University of Applied Sciences, Quellgasse 21, 2502 Biel/Bienne, Switzerland
3. Laboratory for Mechanics of Materials and Nanostructures, Empa, Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, 3602 Thun, Switzerland