1. Stepanov Institute of Physics, National Academy of Sciences of Belarus; Nezalezhnasti Ave. 68 Minsk 220072 Belarus
2. National Nanotechnology Centre, King Abdulaziz City for Science and Technology; PO Box No. 6086 11442 Riyadh Saudi Arabia
3. SemiTEq JSC; Engels Ave. 27 Saint-Petersburg 194156 Russia