Magnetoplasmons in quasi-neutral epitaxial graphene nanoribbons

Abstract

We present infrared transmission spectroscopy study of the inter-Landau-level excitations in quasi-neutral epitaxial graphene nanoribbon arrays. We observed a substantial deviation in energy of the $L_{0(-1)}$$\to$$L_{1(0)}$ transition from the characteristic square root magnetic-field dependence of two-dimensional graphene. This deviation arises from the formation of upper-hybrid mode between the Landau level transition and the plasmon resonance. In the quantum regime the hybrid mode exhibits a distinct dispersion relation, markedly different from that expected for conventional two-dimensional systems and highly doped graphene.

References in corpus (16)

• Graphene plasmonics
• Manipulating infrared photons using plasmons in transparent graphene superlattices
• Mid-infrared plasmons in scaled graphene nanostructures
• Approaching the Dirac point in high mobility multi-layer epitaxial graphene
• Landau level spectroscopy of ultrathin graphite layers
• Infrared spectroscopy of Landau levels in graphene
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• Magnetic field tuning of terahertz Dirac plasmons in graphene
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• Excitations from Filled Landau Levels in Graphene
• Collective modes of doped graphene and a standard 2DEG in a strong magnetic field: linear magneto-plasmons versus magneto-excitons
• Quasi-classical cyclotron resonance of Dirac fermions in highly doped graphene
• Magnetoplasmons excitations in graphene for filling factors $\nu \le 6$
• Electromagnetic response and effective gauge theory of graphene in a magnetic field
• Spin-flip excitations, spin waves, and magneto-excitons in graphene Landau levels at integer filling factors
• Theory of Bernstein Modes in Graphene

Cited by in corpus (16)

• Plasmonics in Dirac systems: from graphene to topological insulators
• Edge and surface plasmons in graphene nanoribbons
• Observation of an intrinsic bandgap and Landau level renormalization in graphene/boron-nitride heterostructures
• Electronic and optical properties of graphene nanoribbons in external fields
• Spin and valley polarization of plasmons in silicene due to external fields
• Magnetoplasmons of the tilted-anisotropic Dirac cone material $\alpha -$(BEDT-TTF)${}_2$I${}_3$
• Probing terahertz surface plasmon waves in graphene structures
• Hyper-doped silicon nanoantennas and metasurfaces for tunable infrared plasmonics
• Magnetoelectronic and optical properties of nonuniform graphene nanoribbons
• Revealing temperature evolution of the Dirac band in ZrTe${}_5$ via magneto-infrared spectroscopy
• Valley and Zeeman Splittings in Multilayer Epitaxial Graphene Revealed by Circular Polarization Resolved Magneto-infrared Spectroscopy
• Undamped relativistic magnetoplasmons in lossy two-dimensional electron systems
• Graphene plasmonics: Physics and potential applications
• Electrically tunable magnetoplasmons in a monolayer of silicene or germanene
• Plasmon-plasmon interaction and the role of buffer in epitaxial graphene micro-flakes
• Magnetic quantization in multilayer graphenes