A.A. Bogdashov – Senior Research Scientist, 
Institute of Applied Physics of RAS (N. Novgorod)
E-mail: bogdash@ipfran.ru

M.Yu. Glyavin – Head of Laboratory, 
Institute of Applied Physics of RAS (N. Novgorod)
E-mail: glyavin@appl.sci-nnov.ru

Yu.V. Novozhilova – Senior Research Scientist, 
Institute of Applied Physics of RAS (N. Novgorod)
E-mail: julia.novozhilova2009@yandex.ru

A.S. Sedov – Research Scientist, 
Institute of Applied Physics of RAS (N. Novgorod)
E-mail: anton-sedov@mail.ru

A.P. Fokin – Research Scientist, 
Institute of Applied Physics of RAS (N. Novgorod)
E-mail: ap.fokin@mail.ru