1. Institute of Spectroscopy, Russian Academy of Sciences, Fizicheskaya street, 5, Troitsk, Moscow 108840, Russia
2. Moscow Institute of Physics and Technology, Institutsky lane, 9, Dolgoprudny, Moscow Region 141700, Russia
3. Federal Scientific Research Centre “Crystallography and Photonics”, Russian Academy of Sciences, 59 Leninskiy Pr., Moscow 119333, Russia
4. Institute for Nuclear Research, Russian Academy of Sciences, Fizicheskaya street, 27, Troitsk, Moscow 108840, Russia
5. P.N. Lebedev Physical Institute, Russian Academy of Sciences, Leninsky Pr. 53, Moscow 119991, Russia