Abstract

Controlling the strength and the sign of magneto-optical phenomena is often desirable for optimizing nonreciprocal effects. It has been successfully demonstrated in recent years how the combination of plasmonic effects and magneto-optical (MO) activity effectively enhances the response of several traditionally weak phenomena [1,2]. Combining for instance MO materials with extraordinary transmission effects through plasmonic nanogratings leads to giant enhancements of the MO effects. We recently demonstrated the theoretical possibility that even more than just an enhancement, the MO effects can also undergo a sign reversal in such magnetoplasmonic gratings by judicious coupling of different grating resonances and anomalies [3]. In this contribution we report for the first time the experimental demonstration of this nonreciprocity engineering.

© 2015 IEEE