Surface plasmons and magneto-optic activity in hexagonal Ni anti-dot arrays
| Abstract | The influence of surface plasmons on the magneto-optic activity in atwo-dimensional hexagonal array is addressed. The experiments wereperformed using hexagonal array of circular holes in a ferromagnetic Nifilm. Well pronounced troughs are observed in the optical reflectivity,resulting from the presence of surface plasmons. The surface plasmonsare found to strongly enhance the magneto-optic response (Kerrrotation), as compared to a continuous film of the same composition. Theinfluence of the hexagonal symmetry of the pattern on the couplingbetween the plasmonic excitations is demonstrated, using opticaldiffraction measurements and theoretical calculations of themagneto-optic and of the angular dependence of the optical activity. |
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| Authors | E. Melander, G. Ctistis, B. Hjörvarsson, V. Kapaklis, E. T. Papaioannou, P. Patoka, M. Giersig, P. Fumagalli, A. Garcia-Martin, S. D. Pappas |
| Year of publication | 2011 |
| Date published | 11/2011 |
| Journal | Opt. Express |
| Volume | 19 |
| Pages | 2386723877 |
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