1. AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, al. A. Mickiewicza 30, PL-30-059 Kraków, Poland
2. AGH University of Science and Technology, Faculty of Electrical Engineering, Automatics, Computer Science and Engineering in Biomedicine, al. A. Mickiewicza 30, PL-30-059 Kraków, Poland
3. Martin-Luther-Universität Halle-Wittenberg, Institut für Physik, von-Seckendorff-Pl. 1, D-06099 Halle/Saale, Germany