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

ABSTRACT: 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.

SUBMITTER: Wiecha MM

PROVIDER: S-EPMC6933792 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature

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

Wiecha Matthias M MM Al-Daffaie Shihab S Bogdanov Andrey A Thomson Mark D MD Yilmazoglu Oktay O Küppers Franko F Soltani Amin A Roskos Hartmut G HG

ACS omega 20191213 26

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 superpos ...[more]

PMID: 31891075

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