Plasmon transport in graphene investigated by time-resolved measurement

Abstract

Plasmons, which are collective charge oscillations, offer the potential to use optical signals in nano-scale electric circuits. Recently, plasmonics using graphene have attracted interest, particularly because of the tunable plasmon frequency through the carrier density $n$. However, the $n$ dependence of the plasmon velocity is weak ($\propto n^{1/4}$) and it is difficult to tune the frequency over orders of magnitude. Here, we demonstrate that the velocity of plasmons in graphene can be changed over two orders of magnitude by applying a magnetic field $B$ and by the presence/absence of a gate; at high $B$, edge magnetoplasmons (EMPs), which are plasmons localized at the sample edge, are formed and their velocity depends on $B$ and the gate screening effect. The wide range tunability of the velocity and the observed low-loss plasmon transport encourage designing graphene nanostructures for plasmonics applications.

arXiv commentsubmitted

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Cited by in corpus (22)

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• On-Chip Microwave Quantum Hall Circulator
• Hall Effect Gyrators and Circulators
• Intrinsic and extrinsic decay of edge magnetoplasmons in graphene
• Zero-field Edge Magnetoplasmons in a Magnetic Topological Insulator
• Unveiling the bosonic nature of an ultrashort few-electron pulse
• On-chip transfer of ultrashort graphene plasmon wavepackets using terahertz electronics
• Gate-Voltage Tunability of Plasmons in Single and Multi-layer Graphene Structures: Analytical Description and Concepts for Terahertz Devices
• Charge Fractionalization in Artificial Tomonaga-Luttinger Liquids with Controlled Interaction Strength
• Edge magnetoplasmons in graphene
• Epigraphene : epitaxial graphene on silicon carbide
• Edge magnetoplasmons in graphene: Effects of gate screening and dissipation
• Unidirectional plasmonic edge modes on general two-dimensional materials
• Determination of intrinsic lifetime of edge magnetoplasmons
• Effects of Screening on Propagation of Graphene Surface Plasmons
• Semiclassical analysis of intraband collective excitations in a two-dimensional electron gas with Dirac spectrum
• Time-resolved measurement of ambipolar edge magnetoplasmon transport in InAs/InGaSb composite quantum wells
• Graphene plasmonics: Physics and potential applications
• Drift velocity of edge magnetoplasmons due to magnetic edge channels
• Coupling between Quantum Hall Edge Channels on Opposite Sides of a Hall Bar
• Possible dimensionality transition behavior in localized plasmon resonances of confinement-controlled graphene devices