Plasmonic absorption properties of bimetallic metamaterials

Abstract

We demonstrate polarization controlled absorption in plasmonic bimetallic metamaterials. We fabricate and experimentally characterize Au/Ni ring resonator arrays, where by varying the wavelength and polarization of the incident wave, local electromagnetic fields and dissipation can be suppressed or enhanced in the Au and Ni areas of the rings.

Magneto-optical response in bimetallic metamaterials

“…Finally, we would like to note that the response of the bimetallic ring metamaterials does not depend strongly on the thickness of the metallic film. An increase of thickness would result in a minor enhancement of the magnetoplasmonic response due to an increase in resonance strength of the Au sections and changes in the magnetic shape anisotropy of the Ni sections [22].…”