1. Faculty of Materials Science and Ceramics, AGH University of Science and Technology, A. Mickiewicza 30, 30-059 Krakow, Poland
2. The University of Texas at Austin, Austin, 78-712 Texas, USA
3. Institute of Chemistry, University of Silesia, Szkolna 9, 40-007 Katowice, Poland
4. Faculty of Electrical Engineering, Bialystok University of Technology, Wiejska 45D Street, 15-351 Bialystok, Poland
5. Optical Spectroscopy Division, University of Wrocław, plac Uniwersytecki 1, 50-137 Wrocław, Poland