Microwave seminar | 06 February 2023

The problem of the lack of efficient devices in the THz frequency range, including for beam steering, is well known. As a solution, we propose an algorithm that allows the synthesis of efficient multilayer transmitting devices on the basis of Huygens metasurfaces, which avoid unwanted reflections. Despite the presence of multiple layers, the considered approach avoids a large number of numerical simulations due to the fact that the proposed algorithm is semi-analytic and can be implemented with the minimum number of numerical simulations required. In this talk, we will review the process of synthesizing and fabricating multilayer Huygens metasurfaces using the example of a five-layer metasurface for a beam deflection of 52 degrees at 0.170 THz with an experimentally measured efficiency of 58%; theoretical and experimental approaches will be discussed.

Main paper/arXiv, related to the seminar, and other references

1) Epstein A., Rabinovich O. Perfect anomalous refraction with metagratings. – 2018.
2) Levy S., Kerzhner Y., Epstein A. Rigorous analytical model for metasurface microscopic design with interlayer coupling //2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting. – IEEE, 2019. – С. 195-196.
3) Killamsetty V. K., Epstein A. Semianalyitcal synthesis scheme for multifunctional metasurfaces on demand //2021 Fifteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials). – IEEE, 2021. – С. 123-125.