Enhanced transmission via a sub-wavelength hole aperture coupled to a high-permittivity resonator

Véronique Sadaune, Lei Kang, Didier Lippens

    Research output: Contribution to journalArticlepeer-review

    3 Scopus citations

    Abstract

    One order of magnitude enhanced transmissivity was demonstrated by microwave scattering parameter measurements of a sub-wavelength single hole aperture (λ/20) coupled to a high-permittivity ferroelectric cube (ε r=120). It was shown that the large permittivity value allows the concentration of the impinging electromagnetic wave on a millimetre scale, compatible with the deep sub-wavelength millimetre-sized aperture without involving surface plasmon mode propagation as in optics. The transmission enhancement explained by a tight coupling between the dielectric resonator and the sub cut-off aperture was experimentally verified by considering coupling distance and hole size as parameters.

    Original languageEnglish (US)
    Article number475102
    JournalJournal of Physics D: Applied Physics
    Volume45
    Issue number47
    DOIs
    StatePublished - Nov 28 2012

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Acoustics and Ultrasonics
    • Surfaces, Coatings and Films

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