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Waveguide plasmon resonance induced enhancement of the magneto-optics in a Ag/Bi:YIG bilayer structure

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Abstract

The optical transmission and magneto-optical (MO) activity in the bilayer systems of a silver film perforated with nanohole arrays and a uniform dielectric film magnetized perpendicular to its plane are investigated. A new peak corresponding to magneto-optic enhancement in the visible region is found, which mainly originates from the interplay of surface plasmon polaritons, localized surface plasmon resonance, and the waveguide resonance. The peak positions of the MO rotations accompanied with large transmittance can be efficiently tailored by changing the geometrical parameters and the filling medium. These findings have significant impacts and applications in highly integrated optoelectronic and MO devices.

© 2015 Optical Society of America

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