Trapping and guiding surface plasmons in curved graphene landscapes

Abstract

We demonstrate that graphene placed on top of structured substrates offers a novel approach for trapping and guiding surface plasmons. A monolayer graphene with a spatially varying curvature exhibits an effective trapping potential for graphene plasmons near curved areas such as bumps, humps and wells. We derive the governing equation for describing such localized channel plasmons guided by curved graphene and validate our theory by the first-principle numerical simulations. The proposed confinement mechanism enables plasmon guiding by the regions of maximal curvature, and it offers a versatile platform for manipulating light in planar landscapes. In addition, isolated deformations of graphene such as bumps are shown to support localized surface modes and resonances suggesting a new way to engineer plasmonic metasurfaces.

6 pages, 4 figures

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Cited by in corpus (7)

• Universal description of channel plasmons in two-dimensional materials
• Optically Forged Diffraction-Unlimited Ripples in Graphene
• Schrödinger formalism for a particle constrained to a surface in ${\mathbb{R}}_1^3$
• Strong plasmon-phonon splitting and hybridization in 2D materials revealed through a self-energy approach
• Current vortices in hexagonal graphene quantum dots
• Tunable Dirac points and zero-energy modes in periodic curved graphene superlattices
• Localized surface plasmons in a continuous and flat graphene sheet