1. Regional Centre of Nanotechnology, South-West State University, 305040 Kursk, Russia
2. Amirkhanov Institute of Physics, Daghestan Scientific Center, Russian Academy of Sciences, 367003 Makhachkala, Russia
3. P.N. Lebedev Physical Institute, Russian Academy of Sciences, 119991 Moscow, Russia
4. Bangamata Sheikh Fojilatunnesa Mujib Science and Technology University, Jamalpur, Bangladesh