Direct Near-Field Observation of Surface Plasmon Polaritons on Silver Nanowires

Matthias M. Wiecha, Shihab Al-Daffaie, Andrey Bogdanov, Mark D. Thomson, Oktay Yilmazoglu, Franko Küppers, Amin Soltani, Hartmut G. Roskos

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)


    Surface plasmon polaritons on (silver) nanowires are promising components for future photonic technologies. Here, we study near-field patterns on silver nanowires with a scattering-type scanning near-field optical microscope that enables the direct mapping of surface waves. We analyze the spatial pattern of the plasmon signatures for different excitation geometries and polarization and observe a plasmon wave pattern that is canted relative to the nanowire axis, which we show is due to a superposition of two different plasmon modes, as supported by electromagnetic simulations including the influence of the substrate. These findings yield new insights into the excitation and propagation of plasmon polaritons for applications in nanoplasmonic devices.

    Original languageEnglish
    Pages (from-to)21962-21966
    Number of pages5
    JournalACS Omega
    Issue number26
    Publication statusPublished - 24 Dec 2019


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