1. Ulyanovsk State University, 432017 Ulyanovsk, Russia
2. Lab-STICC (UMR 6285), CNRS, ENIB, 29238 Brest Cedex 3, France
3. Donetsk Institute for Physics and Engineering named after O. O. Galkin (Branch in Kharkiv) of the National Academy of Sciences of Ukraine, 03028 Kyiv, Ukraine
4. V. N. Karazin Kharkiv National University, 61022 Kharkiv, Ukraine