Surface plasmons and magneto-optic activity in hexagonal Ni anti-dot arrays

Evangelos Th. Papaioannou, Vassilios Kapaklis, Emil Melander, Björgvin Hjörvarsson, Spiridon D. Pappas, Piotr Patoka, Michael Giersig, Paul Fumagalli, Antonio Garcia-Martin, Georgios Ctistis

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Abstract

The influence of surface plasmons on the magneto-optic activity in a two-dimensional hexagonal array is addressed. The experiments were performed using hexagonal array of circular holes in a ferromagnetic Ni film. Well pronounced troughs are observed in the optical reflectivity, resulting from the presence of surface plasmons. The surface plasmons are found to strongly enhance the magneto-optic response (Kerr rotation), as compared to a continuous film of the same composition. The influence of the hexagonal symmetry of the pattern on the coupling between the plasmonic excitations is demonstrated, using optical diffraction measurements and theoretical calculations of the magneto-optic and of the angular dependence of the optical activity.
Original languageEnglish
Pages (from-to)23867-23877
Number of pages10
JournalOptics express
Volume19
Issue number24
DOIs
Publication statusPublished - 2011

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    Papaioannou, E. T., Kapaklis, V., Melander, E., Hjörvarsson, B., Pappas, S. D., Patoka, P., ... Ctistis, G. (2011). Surface plasmons and magneto-optic activity in hexagonal Ni anti-dot arrays. Optics express, 19(24), 23867-23877. https://doi.org/10.1364/OE.19.023867