Magnetic localized surface plasmons supported by metal structures

Abstract

Here we study the effect of realistic metal properties on the emergence of magnetic localized surface plasmons. These are subwavelength magnetic dipole modes supported by metallic particles that are corrugated with very long, curved grooves. By means of numerical simulations, we show that, despite the presence of losses in the metal, the concept of magnetic localized surface plasmons is general and can be applied to a broad range of frequencies, up to the mid-infrarred regime.