1. Institute for Physics of Microstructures of the Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
2. Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, Russia
3. Physical-Technical Research Institute of Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, Russia
4. FGUE “Salut,” 603950 Nizhny Novgorod, Russia