1. PhLAM, L'Université de Lille, Villeneuve-d’Ascq, France
2. Department of Physics of Crystlas, Institute of Physics, Kyiv, Ukraine
3. Faculty of Physics, Warsaw University of Technology, Warsaw, Poland
4. Aerospace Faculty, National Aviation University, Kiev, Ukraine
5. Institute of Technical Physics, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Riga, Latvia
6. Department of Surface Physics and Semiconductor Nanophotonics, V. Lashkaryov Institute of Semiconductor Physics, Kyiv, Ukraine