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Graphene Plasmon Cavities Made with Silicon Carbide

AuthorsLi, K.; Fitzgerald, J. M.; Xiao, X.; Caldwell, J. D.; Zhang, C.; Maier, S. A.; Li, X.; Giannini, V.
Issue Date14-Jul-2017
PublisherAmerican Chemical Society
CitationACS Omega 2(7): 3640-3646 (2017)
AbstractWe propose a simple way to create tunable plasmonic cavities in the infrared (IR) range using graphene films suspended upon a silicon carbide (SiC) grating and present a numerical investigation, using the finite element method, on the absorption properties and field distributions of such resonant structures. We find at certain frequencies within the SiC reststrahlen band that the structured SiC substrate acts as a perfect reflector, providing a cavity effect by establishing graphene plasmon standing waves. We also provide clear evidence of strong coupling phenomena between the localized surface phonon polariton resonances in the SiC grating with the graphene surface plasmon cavity modes, which is revealed by a Rabi splitting in the absorption spectrum. This paves the way to build simple plasmonic structures, using well-known materials and experimental techniques, that can be used to excite graphene plasmons efficiently, even at normal incidence, as well as explore cavity quantum electrodynamics and potential applications in IR spectroscopy.
Description7 pags., 6 figs. -- Correction http://hdl.handle.net/10261/234590
Publisher version (URL)http://doi.org/10.1021/acsomega.7b00726
Identifiersdoi: 10.1021/acsomega.7b00726
issn: 2470-1343
Appears in Collections:(CFMAC-IEM) Artículos
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