Wide-band enhancement of the transverse magneto-optical Kerr effect in magnetite-based plasmonic crystals

S. A. Dyakov, I. M. Fradkin, N. A. Gippius, L. Klompmaker, F. Spitzer, E. Yalcin, I. A. Akimov, M. Bayer, D. A. Yavsin, S. I. Pavlov, A. B. Pevtsov, S. Y. Verbin, S. G. Tikhodeev

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    19 Citations (Scopus)

    Abstract

    The transverse magneto-optical Kerr effect (TMOKE) in magnetite-based magnetoplasmonic crystals is studied experimentally and theoretically. We analyze angle-resolved TMOKE spectra from two types of structures where noble metallic stripes are incorporated inside a thin magnetite film or located on top of a homogeneous film. A multiple-wide-band enhancement of the TMOKE signal in transmission is demonstrated. The complex dielectric permittivity and gyration are experimentally determined using the ellipsometry technique as well as Faraday rotation and ellipticity measurements. The obtained parameters are used in rigorous coupled-wave analysis (RCWA) calculations for studying the optical resonances. Our RCWA calculations of transmittance and TMOKE are in good agreement with the experimental data. The role of guiding and plasmonic modes in the TMOKE enhancement is revealed. We demonstrate that the TMOKE provides rich information about the studied optical resonances.

    Original languageEnglish
    Article number214411
    JournalPhysical Review B
    Volume100
    Issue number21
    DOIs
    Publication statusPublished - 11 Dec 2019

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