Broadband focusing of acoustic plasmons in graphene with an applied current

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

doi:10.1103/PhysRevB.104.L161409

Broadband focusing of acoustic plasmons in graphene with an applied current

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

Research output: Contribution to journal › Article › peer-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 language	English (US)
Article number	L161409
Journal	Physical Review B
Volume	104
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.104.L161409
State	Published - Oct 15 2021
Externally published	Yes

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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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.",

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AU - Margetis, Dionisios

AU - Mele, E. J.

AU - Low, Tony

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N2 - 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.

AB - 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.

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Broadband focusing of acoustic plasmons in graphene with an applied current

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