1. Department
of Applied Physics, Aalto University, Puumiehenkuja 2, 00076, Espoo, Finland
2. Saint-Petersburg State Polytechnical University, Polytechnicheskaya 29, 195251, Saint-Petersburg, Russia
3. Institute of Photonic
Technology, Albert-Einstein Strasse
9, 07745 Jena, Germany
4. Kemerovo State University, 6 Krasnaya
Street, Kemerovo 650043, Russia
5. Skolkovo Institute
of Science and Technology, 100 Novaya
Street, Skolkovo, Odintsovsky District, Moscow
Region, 143025, Russia