Plasmons in electrostatically doped graphene

Abstract

Graphene has raised high expectations as a low-loss plasmonic material in which the plasmon properties can be controlled via electrostatic doping. Here, we analyze realistic configurations, which produce inhomogeneous doping, in contrast to what has been so far assumed in the study of plasmons in nanostructured graphene. Specifically, we investigate backgated ribbons, co-planar ribbon pairs placed at opposite potentials, and individual ribbons subject to a uniform electric field. Plasmons in backgated ribbons and ribbon pairs are similar to those of uniformly doped ribbons, provided the Fermi energy is appropriately scaled to compensate for finite-size effects such as the divergence of the carrier density at the edges. In contrast, the plasmons of a ribbon exposed to a uniform field exhibit distinct dispersion and spatial profiles that considerably differ from uniformly doped ribbons. Our results provide a road map to understand graphene plasmons under realistic electrostatic doping conditions.

9 pages, 9 figures

References in corpus (8)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Dynamical polarization of graphene at finite doping
• Plasmons in nearly touching metallic nanoparticles: singular response in the limit of touching dimers
• Infrared nanoscopy of Dirac plasmons at the graphene-SiO2 interface
• Charge accumulation at the boundaries of a graphene strip induced by a gate voltage: Electrostatic approach
• Plasmons in electrostatically doped graphene
• Conductivity of a graphene strip: width and gate-voltage dependencies

Cited by in corpus (20)

• Graphene Plasmonics: Challenges and Opportunities
• Plasmons in graphene: Recent progress and applications
• A Primer on Surface Plasmon-Polaritons in Graphene
• Electronic modulation of infrared emissivity in graphene plasmonic resonators
• Enhanced light-matter interaction in graphene-covered gold nanovoid arrays
• Terahertz Science and Technology of Carbon Nanomaterials
• Tunable Large Resonant Absorption in a Mid-IR Graphene Salisbury Screen
• Tunable plasmons in atomically thin gold nanodisks
• Multiple Excitation of Confined Graphene Plasmons by Single Free Electrons
• Analysis of surface plasmon excitation at terahertz frequencies with highly-doped graphene sheets via attenuated total reflection
• Anomalous doping effect in black phosphorene from first-principles calculations
• Anomalous Reflection Phase of Graphene Plasmons and its Influence on Resonators
• Molecular Sensing with Tunable Graphene Plasmons
• Plasmons in electrostatically doped graphene
• Plasmonics in Atomically Thin Materials
• Graphene nanoribbon based spaser
• Dissipative plasmon solitons in graphene nanodisk arrays
• Terahertz Magnetoplasmon Energy Concentration and Splitting in Graphene PN Junctions
• Electrical plasmon detection in graphene waveguides
• Generation and control of localized terahertz fields in photoemitted electron plasmas