1. Regional Centre of Advanced Technologies and Materials Joint Laboratory of Optics of Palacký University and Institute of Physics AS CR Faculty of Science Palacký University 17. listopadu 12 Olomouc 771 46 Czech Republic
2. Institute of Physics Academy of Sciences of the Czech Republic Na Slovance 2 182 21 Prague 8 Czech Republic
3. Institute for Problems of Materials Science Academy of Sciences of Ukraine 3 Krzhyzhanovsky St. 03142 Kiev Ukraine