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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.
In: New Journal of Physics, 17 (5)
doi: 10.26083/tuprints-00020605
Article, Secondary publication, Publisher's Version

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.

Item Type: Article
Erschienen: 2022
Creators: Sorger, Christian ; Preu, Sascha ; Schmidt, Johannes ; Winnerl, Stephan ; Bludov, Yuliy V. ; Peres, Nuno M. R. ; Vasilevskiy, Mikhail ; Weber, Heiko B.
Type of entry: Secondary publication
Title: Terahertz response of patterned epitaxial graphene
Language: English
Date: 2022
Publisher: IOP Publishing
Journal or Publication Title: New Journal of Physics
Volume of the journal: 17
Issue Number: 5
Collation: 7 Seiten
DOI: 10.26083/tuprints-00020605
URL / URN: https://tuprints.ulb.tu-darmstadt.de/20605
Corresponding Links:
Origin: Secondary publication service
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.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-206051
Classification DDC: 500 Science and mathematics > 530 Physics
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP)
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: 21 Feb 2022 11:06
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