title: Surface plasmons and magneto-optic activity in hexagonal Ni anti-dot arrays.
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.
authors: Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden.
authors: Evangelos Th
authors: ET
authors: Papaioannou
authors: Vassilios
authors: V
authors: Kapaklis
authors: Emil
authors: E
authors: Melander
authors: Björgvin
authors: B
authors: Hjörvarsson
authors: Spiridon D
authors: SD
authors: Pappas
authors: Piotr
authors: P
authors: Patoka
authors: Michael
authors: M
authors: Giersig
authors: Paul
authors: P
authors: Fumagalli
authors: Antonio
authors: A
authors: Garcia-Martin
authors: Georgios
authors: G
authors: Ctistis
mesh_terms: D008027:Light; D060526:Magnetic Fields; D008422:Materials Testing; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D012031:Refractometry; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*
chemical_list: D008567:Membranes, Artificial; D009532:Nickel