1. Department of Physical Optics and Applied Informatics, Faculty of Physics, Belarusian State University, Minsk, 220030, Belarus
2. Faculty of Physics, Taras Shevchenko National University of Kyiv, Kyiv, 01601, Ukraine
3. Republican Scientific Center for Human Issues of Belarusian State University, Minsk, 220045, Belarus
4. A.N. Sevchenko Institute of Applied Physical Problems of Belarusian State University, Minsk, 220045, Belarus