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  • Title: Graphene plasmon waveguiding and hybridization in individual and paired nanoribbons.
    Author: Christensen J, Manjavacas A, Thongrattanasiri S, Koppens FH, de Abajo FJ.
    Journal: ACS Nano; 2012 Jan 24; 6(1):431-40. PubMed ID: 22147667.
    Abstract:
    Plasmons in doped graphene exhibit relatively large confinement and long lifetime compared to noble-metal plasmons. Here, we study the propagation properties of plasmons guided along individual and interacting graphene nanoribbons. Besides their tunability via electrostatic gating, an additional handle to control these excitations is provided by the dielectric environment and the relative arrangement of the interacting waveguides. Plasmon interaction and hybridization in pairs of neighboring aligned ribbons are shown to be strong enough to produce dramatic modifications in the plasmon field profiles. We introduce a universal scaling law that considerably simplifies the analysis an understanding of these plasmons. Our work provides the building blocks to construct graphene plasmon circuits for future compact plasmon devices with potential application to optical signal processing, infrared sensing, and quantum information technology.
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