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Extended frequency range of transverse-electric surface plasmon polaritons in graphene

Ahmad, Zeeshan, Muljarov, Egor and Oh, Sang Soon 2021. Extended frequency range of transverse-electric surface plasmon polaritons in graphene. Physical Review B (Condensed Matter) 104 , 085426. 10.1103/PhysRevB.104.085426

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Abstract

The dispersion relation of surface plasmon polaritons in graphene that includes optical losses is often obtained for complex wave vectors while the frequencies are assumed to be real. This approach, however, is not suitable for describing the temporal dynamics of optical excitations and the spectral properties of graphene. Here we propose an alternative approach that calculates the dispersion relation in the complex frequency and real wave vector space. This approach provides a clearer insight into the optical properties of a graphene layer and allows us to find the surface plasmon modes of a graphene sheet in the full frequency range, thus removing the earlier reported limitation (1.667

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Additional Information: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license
Publisher: American Physical Society
ISSN: 0163-1829
Date of First Compliant Deposit: 26 August 2021
Date of Acceptance: 2 August 2021
Last Modified: 26 Aug 2021 10:30
URI: http://orca.cardiff.ac.uk/id/eprint/143642

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