META Conference, META'12

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Extraordinary Nonreciprocal Effects in Magnetoplasmonic Nanogratings
Lukas Halagacka, Mathias Vanwolleghem, Kamil Postava, Béatrice Dagens

Last modified: 2012-01-04

Abstract


The combination of nonreciprocal magneto-optical materials and strong field confinement via surface plasmon polariton coupling on metallic interfaces or nanostructures, has led to discovery of a large variety of strongly enhanced magneto-optical phenomena. We will illustrate this by two recently discovered novel phenomena. First we show how EOT when properly combined with a MO substrate leads to an anomalous switching of the magneto-optic effect. Subsequently, it is shown how also in integrated magnetoplasmonic structures enhanced nonreciprocal effects appear. Evanescent coupling to narrow subwavelength air slits in thin ferromagnetic metal films leads to an extraordinary dispersion of the fundamental Bloch modes.

Keywords


magneto-optics, plasmonics, nonreciprocity