1. Stepanov Institute of Physics; National Academy of Sciences of Belarus; Nezalezhnasti Ave. 68 220072 Minsk Belarus
2. National Nanotechnology Centre; King Abdulaziz City for Science and Technology; PO Box No. 6086 11442 Riyadh Saudi Arabia
3. Ioffe Institute; Politekhnicheskaya 26 194021 St. Petersburg Russia