PhD Student of the Radio Engineering, Opto- and Nanoelectronics Department, Ulyanovsk State Technical University (Russia, 432027, Ulyanovsk, Severny Venets st., 32); Senior Engineer of the Ulyanovsk Branch of the Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences (Russia, 432071, Ulyanovsk, Goncharova st. 48/2)