Direct near-field mapping of nano-sphere-excited leaky surface modes atanisotropic metasurface: Paper

F. Walla, F. Bürkle, I. Sinev, Andrey Bogdanov, F. Komissarenko, Alinaghi Soltani, Radu Malureanu, A.V. Lavrinenko, H. G. Roskos

    Research output: Contribution to journalConference articleResearchpeer-review

    265 Downloads (Orbit)

    Abstract

    Leaky surface modes on an ultra-thin anisotropic gold metasurface are directly observed through scattering-type scanning near-field optical microscopy (s-SNOM). Surface modes are excited by focussing light onto a resonant silicon nano-sphere positioned on the surface by nano-manipulation under electron-beammonitoring. The light scattered from the nano-sphere is ableto excitesurface modes with a broad range of wavevectors. The asymmetric air-metasurface-insulator structure supports a leaky surface mode which is confined at the top interface and leaks into the higher-index substrate. s-SNOM near-field mapping of the leaky surface wave is in good agreement with the results of the full-wave simulationsof the electro-magnetic modes on the structure.
    Original languageEnglish
    Article number012165
    Book seriesJournal of Physics: Conference Series
    Volume1092
    Issue number1
    Number of pages3
    ISSN1742-6596
    DOIs
    Publication statusPublished - 2018

    Fingerprint

    Dive into the research topics of 'Direct near-field mapping of nano-sphere-excited leaky surface modes atanisotropic metasurface: Paper'. Together they form a unique fingerprint.

    Cite this