Strong coupling in the far-infrared between graphene plasmons and the surface optical phonons of silicon dioxide
arXiv:1405.7607 · doi:10.1021/ph500233s
Abstract
We study plasmonic resonances in electrostatically gated graphene nanoribbons on silicon dioxide substrates. Absorption spectra are measured in the mid-far infrared and reveal multiple peaks, with width-dependent resonant frequencies. We calculate the dielectric function within the random phase approximation and show that the observed spectra can be explained by surface-plasmon-phonon-polariton modes, which arise from coupling of the graphene plasmon to three surface optical phonon modes in the silicon dioxide.
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- Tunable plasmons in large area WTe2 thin films
- Graphene plasmonics: Physics and potential applications
- Hyperbolic phonon-plasmon polaritons in a hBN-graphene van der Waals structure