Title: Terahertz Optoelectronic Property of Graphene: Substrate-Induced Effects on Plasmonic Characteristics
Authors: Lin, I-Tan
Lai, Yi-Ping
Wu, Kuang-Hsiung
Liu, Jia-Ming
Department of Electrophysics
Keywords: graphene;plasmon;coupling;phonon;scattering rate;optical conductivity;terahertz;Drude model
Issue Date: 1-Mar-2014
Abstract: The terahertz plasmon dispersion of a multilayer system consisting of graphene on dielectric and/or plasma thin layers is systematically investigated. We show that graphene plasmons can couple with other quasiparticles such as phonons and plasmons of the substrate; the characteristics of the plasmon dispersion of graphene are dramatically modified by the presence of the coupling effect. The resultant plasmon dispersion of the multilayer system is a strong function of the physical parameters of the spacer and the substrate, signifying the importance of the substrate selection in constructing graphene-based plasmonic devices.
URI: http://dx.doi.org/10.3390/app4010028
ISSN: 2076-3417
DOI: 10.3390/app4010028
Journal: Applied Sciences-Basel
Begin Page: 28
End Page: 41
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