sergei tretyakov

Metasurfaces for Shaping Reflected and Scattered Waves

In this presentation, we will discuss recent research results on engineering refection and absorption properties of metasurfaces. We will consider anomalous reflectors of different types and “multi-channel” metasurfaces that control reflection and absorption of waves coming from several different directions, including both reciprocal and nonreciprocal devices, realized using time-space modulated metasurfaces. Finally, we will explain how the fields reflected and scattered from finite-sized anomalous reflectors can be analytically calculated. These results are especially relevant for developments of future telecommunication systems based on reconfigurable intelligent surfaces.

Sergei A. TRETYAKOV received the Dipl. Engineer-Physicist, the Candidate of Sciences (PhD), and the Doctor of Sciences degrees (all in radiophysics) from the St. Petersburg State Technical University (Russia), in 1980, 1987, and 1995, respectively. From 1980 to 2000 he was with the Radiophysics Department of the St. Petersburg State Technical University. Presently, he is professor of radio science at the Department of Electronics and Nanoengineering, Aalto University, Finland. His main scientific interests are electromagnetic field theory, complex media electromagnetics, metamaterials, and microwave engineering. He has authored or co-authored six research monographs and more than 300 journal papers. Prof. Tretyakov served as President of the Virtual Institute for Artificial Electromagnetic Materials and Metamaterials (”Metamorphose VI”), as General Chair, International Congress Series on Advanced Electromagnetic Materials in Microwaves and Optics (Metamaterials), from 2007 to 2013, and as Chairman of the St. Petersburg IEEE ED/MTT/AP Chapter from 1995 to 1998. Prof. Tretyakov is an IEEE Fellow.