1. Leibniz Universitaet Hannover, Institute of Micro Production Technology, An der Universitaet 2, 30823 Garbsen, Germany
2. Leibniz Universitaet Hannover, Hanover Centre of Optical Technologies, Nienburger Straße 17, 30167 Hanover, Germany
3. Leibniz Universitaet Hannover, Institute of Measurement and Automatic Control, Nienburger Straße 17, 30167 Hanover, Germany