Plasmon Enhanced Faraday Rotation in Thin Films

Abstract

We have analyzed analytically the Faraday rotation of an electromagnetic wave for magnetoactive thin metallic film with a nanostructured surface profile. Periodical as well as random surface profiles were considered. The plasmon contribution to the Faraday angle was studied. For periodical grating case, we have shown that the maximum of rotation angle is achieved when surface plasmon wave number coincides with one of the wave numbers of the inverse lattice. Enhancement of the Faraday angle at plasmonic band edges is predicted. In the case of random surface profile, it is shown that the diffusion of surface magnetoplasmons gives a dominant contribution to Faraday rotation. Comparison with the experiments is carried out.

14pages, 2 figures

References in corpus (4)

• Giant Faraday rotation in single- and multilayer graphene
• Ultrafast Time-Resolved Faraday Rotation in EuO Thin Films
• Effects of interband transitions on Faraday rotation in metallic nanoparticles
• Faraday Rotation in a Disordered Medium

Cited by in corpus (4)

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• Polar magneto-optic Kerr and Faraday effects in finite periodic \texorpdfstring{$\mathcal{P}\mathcal{T}$}{PT}-symmetric systems
• On the correlation of light polarization in uncorrelated disordered magnetic media