Plasmonic V-groove waveguides with Bragg grating filters via nanoimprint lithography

Cameron L. C. Smith, Boris Desiatov, Ilya Goykmann, Irene Fernandez Cuesta, Uriel Levy, Anders Kristensen

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    Abstract

    We demonstrate spectral filtering with state-of-the-art Bragg gratings in plasmonic V-groove waveguides fabricated by wafer scale processing based on nanoimprint lithography. Transmission spectra of the devices having 16 grating periods exhibit spectral rejection of the channel plasmon polaritons with 8.2 dB extinction ratio and -3 dB bandwidth of Δλ = 39.9 nm near telecommunications wavelengths. Near-field scanning optical microscopy measurements verify spectral reflection from the grating structures, and the oscillations of propagating modes along grating-less V- grooves correspond well with effective refractive index values calculated by finite element simulations in COMSOL. The results represent advancement towards the implementation of plasmonic V-grooves with greater functional complexity and mass-production compatibility.
    Original languageEnglish
    JournalOptics Express
    Volume20
    Issue number5
    Pages (from-to)5696-5706
    ISSN1094-4087
    Publication statusPublished - 2012

    Keywords

    • Waveguides, channeled
    • Surface plasmons
    • Gratings

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