Circular dichroism of metasurfaces based on resonators with different n-fold rotational symmetry

Ksenia V. Bebekh; Anna V. Vozianova; Maxim S. Masyukov; Mikhail K. Khodzitsky

doi:10.1117/12.2583604

17 November 2020 Circular dichroism of metasurfaces based on resonators with different n-fold rotational symmetry

Ksenia V. Bebekh, Anna V. Vozianova, Maxim S. Masyukov, Mikhail K. Khodzitsky

Proceedings Volume 11582, Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications; 115821V (2020) https://doi.org/10.1117/12.2583604
Event: Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications, 2020, Tomsk, Russian Federation

Abstract

Metasurface with periodic subwavelength resonators, placed on dielectric substrate is one of the main research interests in the terahertz (THz) photonics. Based on metal/graphene hybrid materials such structures can achieve giant tunable asymmetric transmission and circular dichroism (CD). In this paper we discuss a circular dichroism of metasurfaces consisted of resonators with n-fold rotational symmetry C_n, i.e. C₂, C₃, C₄. The numerical simulation was performed using CST Microwave Studio. Theoretical analysis combines symmetry restrictions in effective polarizability approximation for calculation of transmission and reflection coefficients. The numerical simulation was done in the millimeter wave range. This research has both fundamental and applied relevance, and may be used in development of terahertz and microwave devices, such as waveplates, polarization sensitive absorbers, etc.

Citation Download Citation

Ksenia V. Bebekh, Anna V. Vozianova, Maxim S. Masyukov, and Mikhail K. Khodzitsky "Circular dichroism of metasurfaces based on resonators with different n-fold rotational symmetry", Proc. SPIE 11582, Fourth International Conference on Terahertz and Microwave Radiation: Generation, Detection, and Applications, 115821V (17 November 2020); https://doi.org/10.1117/12.2583604

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