1. Faculty of Physics, University of Białystok, K. Ciołkowskiego 1L, 15-245 Białystok, Poland
2. Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
3. Laboratoire de Physique des Solides, Université Paris-Sud, CNRS UMR 8502, F-91405 Orsay Cedex, France
4. Institute of Physics CAS, Prague, 18221, Czech Republic
5. Laboratoire de Photonique et de Nanostructures, CNRS UPR 20, Marcoussis, F-91460, France
6. IT4Innovations and Nanotechnology Centre, VSB-Technical University of Ostrava, 17 Listopadu 15, 708 33 Ostrava-Poruba, Czech Republic
7. Helmoltz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany
8. Department of Electronics, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland