Nonlinear nanofocusing in tapered plasmonic waveguides

Arthur R. Davoyan, Ilya V. Shadrivov, Alexander A. Zharov, Dmitri K. Gramotnev, Yuri S. Kivshar

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    117 Citations (Scopus)

    Abstract

    We suggest using tapered waveguides for compensating losses of surface plasmon-polaritons in order to enhance nonlinear effects at the nanoscale. We study nonlinear plasmon self-focusing in tapered metal-dielectric-metal slot waveguides and demonstrate that, by an appropriate choice of the taper angle, we can effectively suppress the mode attenuation achieving stable propagation of a spatial plasmon soliton. For larger tapering angles we observe plasmon-beam nanofocusing in both spatial dimensions.

    Original languageEnglish
    Article number116804
    JournalPhysical Review Letters
    Volume105
    Issue number11
    DOIs
    Publication statusPublished - 9 Sept 2010

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