1. Institute of Physics and Astronomy University of Potsdam 14476 Potsdam Germany
2. Department 8.5 Micro‐NDT Federal Institute of Materials Research and Testing Unter den Eichen 87 12205 Berlin Germany
3. Department of Physics and Astronomy Washington State University 100 Dairy Road Pullman WA 99164 USA
4. Polymers and Electronics Fraunhofer Institute for Applied Polymer Research Geiselbergstr. 69 14476 Potsdam Germany
5. Institute for Materials Research (IMO‐IMOMEC) Hasselt University Wetenschapspark 1 Diepenbeek BE – 3590 Belgium