1. Federal Research Center Institute of Applied Physics of the Russian Academy of Sciences (IAP RAS) 46 Ul'yanov Street Nizhny Novgorod 603950 Russia
2. P.N. Lebedev Physical Institute 53 Leninskij Prospekt Moscow 119991 Russia
3. Lobachevsky University Gagarin ave., 23 Nizhniy Novgorod 603950 Russia
4. Texas A & M University 4242 TAMU College Station TX 77843 USA
5. Russian Quantum Center 100 Novaya St. Skolkovo Moscow 143025 Russia