1. A. M. Prokhorov General Physics Institute of RAS, Vavilov str. 38, 119991 Moscow, Russia
2. Moscow Institute of Physics and Technology, Institutskii per. 9, 141700 Dolgoprudnyi, Russia
3. I. Frantsevich Institute for Problems of Materials Science NAS, Krzhyzhanovsky str. 3, 03680 Kiev, Ukraine
4. Moscow Engineering Physics Institute, Kashirskoe sh. 31, 115409 Moscow, Russia
5. Institute of Experimental Physics SAS, Watsonova 47, 040 01 Košice, Slovakia