1. Nanoelectromagnetics LaboratoryResearch Institute for Nuclear Problems11 Bobrujskaya Str.Minsk220030Belarus
2. Center of Innovations CollaborationsRyazan State Radio Engineering University59/1 Gagarina StreetRyazan390005Russia
3. Department of Physics and MathematicsUniversity of Eastern FinlandInstitute of Photonics7 Yliopistokatu80101JoensuuFinland