1 Centre for Physics and Technological Research (CeFITec), Dept. de Física da Faculdade de Ciências e Tecnologia (FCT), Universidade Nova de Lisboa, 2829-516, Caparica, Portugal.
2 Ryazan State Radio Engineering University, Gagarin Str. 59/1, 390005, Ryazan, Russian Federation.
3 Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and Hubei Key Laboratory of Nuclear Solid Physics, School of Physics and Technology, Wuhan University, 430072, Wuhan, China.
4 Institute for Physics of Microstructures of the Russian Academy of Sciences (IPM RAS), 603950 Nizhniy Novgorod, Russian Federation.
5 Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory, 119991, Moscow, Russian Federation.