Switchable invisibility of dielectric resonators

Mikhail V. Rybin, Kirill B. Samusev, Polina V. Kapitanova, Dmitry S. Filonov, Pavel A. Belov, Yuri S. Kivshar, Mikhail F. Limonov

    Research output: Contribution to journalArticlepeer-review

    18 Citations (Scopus)


    The study of invisibility of an infinite dielectric rod with high refractive index is based on the two-dimensional Mie scattering problem, and it suggests strong suppression of scattering due to the Fano interference between spectrally broad nonresonant waves and narrow Mie-resonant modes. However, when the dielectric rod has a finite extension, it becomes a resonator supporting the Fabry-Perot modes which introduce additional scattering and eventually destroy the invisibility. Here we reveal that for shorter rods with modest values of the aspect ratio r/L (where r and L are the radius and length of the rod, respectively), the lowest spectral window of the scattering suppression recovers completely, so that even a finite-size resonator may become invisible. We present a direct experimental verification of the concept of switchable invisibility at microwaves using a cylindrical finite-size resonator with high refractive index.

    Original languageEnglish
    Article number165119
    JournalPhysical Review B
    Issue number16
    Publication statusPublished - 13 Apr 2017


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