**Acknowledgements**

This work was financially supported by the Ministry of Education and Science of the Russian Federation in the framework of the basic parts of the state and project assignments for works on the organization of scientific research conducted by Tupolev Kazan National Research Technical University (Kazan Aircraft Institute) at R&D Institute of Applied Electrodynamics, Photonics and Living Systems, and Department of Radiophotonics and Microwave Technol‐ ogies (program "Photonics", 3.1962.2014K).
