Thickness dependent enhancement of the polar Kerr rotation in Co magnetoplasmonic nanostructures

  title={Thickness dependent enhancement of the polar Kerr rotation in Co magnetoplasmonic nanostructures},
  author={Richard M. Rowan-Robinson and Emil Melander and Ioan-Augustin Chioar and Blanca Caballero and Antonio Garc'ia-Mart'in and Evangelos Th. Papaioannou and Vassilios Kapaklis},
  journal={AIP Advances},
Large surface plasmon polariton assisted enhancement of the magneto-optical activity has been observed in the past, through spectral measurements of the polar Kerr rotation in Co hexagonal antidot arrays. Here, we report a strong thickness dependence, which is unexpected given that the Kerr effect is considered a surface sensitive phenomena. The maximum Kerr rotation was found to be -0.66 degrees for a 100 nm thick sample. This thickness is far above the typical optical penetration depth of a… 
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