1. Optoelectronic Department, P.N. Lebedev Physical Institute of the Russian Academy of Sciences (FIAN), Moscow, Russia
2. Department of Applied Science and Technology (DISAT), Politecnico di Torino, Physics Institute of Condensed Matter and Complex Systems, CNISM, Torino, Italy
3. PhysBio Department, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Moscow, Russia
4. CNR Institute of Nanotechnology (CNR NanoTec), Rende, Italy