1. Institute of Spectroscopy, Russian Academy of Sciences, ul. Fizicheskaya 5, Troitsk, Moscow, 108840, Russian Federation
2. Moscow Institute of Physics and Technology (State University), Institutskii per. 9, Dolgoprudnyi, Moscow Region, 141700, Russian Federation
3. École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
4. Moscow State Pedagogical University, M. Pirogovskay, 1, Moscow, 119435, Russian Federation