V.A. Kaloshin - Dr. Sc. (Phys.-Math.), Head of Laboratory, Kotel\'nikov IRE of RAS (Moscow), Professor, Moscow Institute of Physics and Technology (State University). E-mail: vak@cplire.ru Nguyen Quoc Duy - Post-graduate Student, Moscow Institute of Physics and Technology (State University). E-mail: duynq.aic@gmail.com