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Terahertz response of patterned epitaxial graphene

Sorger, Christian ; Preu, Sascha ; Schmidt, Johannes ; Winnerl, Stephan ; Bludov, Yuliy V. ; Peres, Nuno M. R. ; Vasilevskiy, Mikhail ; Weber, Heiko B. (2022):
Terahertz response of patterned epitaxial graphene. (Publisher's Version)
In: New Journal of Physics, 17 (5), IOP Publishing, e-ISSN 1367-2630,
DOI: 10.26083/tuprints-00020605,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: Terahertz response of patterned epitaxial graphene
Language: English
Abstract:

We study the interaction between polarized terahertz (THz) radiation and micro-structured large-area graphene in transmission geometry. In order to efficiently couple the radiation into the two-dimensional material, a lateral periodic patterning of a closed graphene sheet by intercalation doping into stripes is chosen. We observe unequal transmittance of the radiation polarized parallel and perpendicular to the stripes. The relative contrast, partly enhanced by Fabry–Perot oscillations reaches 20%. The effect even increases up to 50% when removing graphene stripes in analogy to a wire grid polarizer. The polarization dependence is analyzed in a large frequency range from <80 GHz to 3 THz, including the plasmon–polariton resonance. The results are in excellent agreement with theoretical calculations based on the electronic energy spectrum of graphene and the electrodynamics of the patterned structure.

Journal or Publication Title: New Journal of Physics
Volume of the journal: 17
Issue Number: 5
Place of Publication: Darmstadt
Publisher: IOP Publishing
Collation: 7 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP) > Terahertz Devices and Systems
Date Deposited: 17 Feb 2022 10:39
Last Modified: 24 Jun 2022 18:02
DOI: 10.26083/tuprints-00020605
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-206051
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20605
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