Siaber, S, Zonetti, S, Cunningham, JE orcid.org/0000-0002-1805-9743 et al. (1 more author) (2019) Terahertz Plasmon Resonances in Two-Dimensional Electron Systems: Modeling Approaches. Physical Review Applied, 11 (6). 064067. ISSN 2331-7019
Abstract
Known approaches to modeling terahertz plasmons in two-dimensional electron systems may differ significantly in their assumptions. There has, however, been little effort to analyze the differences between and application of different models to the same sets of structures. This paper discusses, develops, and compares several different theoretical approaches—namely, an effective-medium approximation, a transmission-line model, modal analysis, and full-wave simulations. In particular, we present a transmission-line model that takes into account the dielectric-air surrounding a two-dimensional system. Using modal analysis, we also solve analytically the problem of plasmon reflection and transmission when plasmons are incident on a junction between gated and ungated two-dimensional waveguides. Comparing the predictions made by the models for several structures, we find good agreement between full-wave simulations and both analytical and numerical modal analysis. The results of the effective-medium approximation and the transmission-line model also agree with each other, but differ quantitatively from those of the full-wave simulations and modal analysis. We attribute the differences to the phases of the plasmon reflection and transmission coefficients obtained with the different approaches. Our analytical expressions for the plasmon transmission and reflection coefficients represent a simple, yet accurate way to model plasmons in two-dimensional systems comprising both gated and ungated sections.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 American Physical Society. Reproduced in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Funding Information: | Funder Grant number EPSRC EP/R00501X/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 28 Mar 2019 11:15 |
Last Modified: | 18 Jan 2023 17:03 |
Status: | Published |
Publisher: | American Physical Society |
Identification Number: | 10.1103/PhysRevApplied.11.064067 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:144151 |