https://doi.org/10.1140/epjd/s10053-023-00636-2
Regular Article – Optical Phenomena and Photonics
Theoretical analysis of hybrid surface plasmon polaritons in plasma-based elliptical structures with graphene layers for THz applications
1
School of Electrical Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
2
Department of Electrical Engineering, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
3
Department of Electrical Engineering, Arak University of Technology, Arak, Iran
a
mo_heydari@alumni.iust.ac.ir
Received:
18
November
2022
Accepted:
14
March
2023
Published online:
7
April
2023
In this article, tunable surface plasmon polaritons (SPPs) in graphene-based elliptical waveguides containing gyro-electric layers are investigated. The general structure has an elliptical cross section, where each gyro-electric layer is surrounded by two graphene layers. The DC magnetic bias is applied on the z-axis. By writing Maxwell’s equations inside the gyro-electric medium and applying boundary conditions, closed-form general relations are obtained for electromagnetic components of SPP waves. As a special case, a new plasma-based elliptical structure with double-layer graphene is studied in this paper. The figure of merit (FOM) for this waveguide can be varied by changing the magnetostatic bias and the chemical doping. At the frequency of 40 THz, the FOM of 139 for this waveguide is reported for the B = 1 T and μc = 0.9 eV. Ability to adjust and tune the propagating properties of SPPs in hybrid graphene-plasma elliptical structures can be exploited for the design of new plasmonic components in the THz spectral region.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
