Broadband focusing of acoustic plasmons in graphene with an applied current

Michael Sammon, Dionisios Margetis, E. J. Mele, Tony Low

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Nonreciprocal plasmons in current-driven, isotropic, and homogenous graphene with proximal metallic gates are theoretically explored. Nearby metallic gates screen the Coulomb interactions, leading to linearly dispersive acoustic plasmons residing close to its particle-hole continuum counterpart. We show that the applied bias leads to spectral broadband focused plasmons whose resonance linewidth is dependent on the angular direction relative to the current flow due to Landau damping. We predict that forward focused nonreciprocal plasmons are possible with accessible experimental parameters and setup.

Original languageEnglish (US)
Article numberL161409
JournalPhysical Review B
Volume104
Issue number16
DOIs
StatePublished - Oct 15 2021

Bibliographical note

Funding Information:
M.S., E.M., and T.L. acknowledge support from the National Science Foundation under Grant No. NSF/EFRI-1741660. D.M. acknowledges partial support by the ARO MURI Award No. W911NF-14-1-0247.

Publisher Copyright:
© 2021 American Physical Society.

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