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. 2022 Nov 3;12(21):3889. doi: 10.3390/nano12213889

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Schematic diagram of the proposed graphene-based metasurface on SiO $_{2}$ substrate. (a) Periodic structure where the incident THz waves with y-polarization is along the z-axis. (b) A unit cell and (c) its top view with geometrical parameters. $a_{0}$ = 18 $μ$ m, $b_{0}$ = 12 $μ$ m, $c_{0}$ = 11 $μ$ m, $d_{0}$ = 7 $μ$ m, $g_{0}$ = 1 $μ$ m, $g_{1}$ = 1 $μ$ m, $w_{0}$ = 4 $μ$ m, and $w_{1}$ = 6 $μ$ m. The periodicity is set to 50 $μ$ m in both x and y directions.