Abstract

We present a theory of light interaction with a magnetic nanostructured material consisting of a periodic array of ferromagnetic nanocylinders magnetized along the symmetry axis. Using a multiple scattering approach, we calculated the amplitudes of diffracted waves in terms of multipole expansion coefficients and used the developed formalism to describe the experimentally observed enhancement of the magneto-optical effects in magnetic nanostructures. The analysis provides a physical interpretation of the enhancement in terms of interference between the resonant and nonresonant scattering processes. The resonant scattering is caused by excitation of dipole surface-plasmon eigenmodes; the nonresonant one is associated with the monopole modes.

© 2012 Optical Society of America

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