Affiliation: | 1. Institute for Problems of Materials Science, Academy of Sciences of Ukraine, 3 Krzhyzhanovsky St., 03142 Kiev, Ukraine;2. Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8, Czech Republic;3. Joint Laboratory of Optics of Palacky University and Institute of Physics of Academy of Sciences of the Czech Republic, v.v.i., 17. listopadu 50, 772 07 Olomouc, Czech Republic |