Magneto-optical intensity effect in a transparent perforated all-dielectric metasurface with an anapole state
Polina V. Zorina, Andrey N. Kalish, Vladimir I. Belotelov, Venu Gopal Achanta, Daria O. Ignatyeva
Abstract
We numerically study a perforated all-dielectric metasurface based on the magnetic semiconductor GaMnAs. Near the anapole state, the structure combines high transmittance with a moderate magneto-optical intensity effect. The absolute transmission modulation is enhanced by about a factor of five compared with a smooth film, while the metasurface transmittance reaches 81%. The enhancement is associated with strong field localization in the magneto-optically active material and suppression of the electric-dipole radiation channel in the anapole regime.
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