Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 29: Micro- and Nanostructured Magnetic Materials
MA 29.3: Vortrag
Mittwoch, 13. März 2013, 15:30–15:45, H23
Magneto-plasmonic properties of Ni anti-dot nano-arrays in the presence of an external magnetic-field — •Evangelos Papaioannou1,2, Burkard Hillebrands1, Vassilios Kapaklis2, Emil Melander2, Erik Östman2, and Björgvin Hjörvarsson2 — 1Fachbereich Physik, Technische Universität Kaiserslautern, D-67663 Kaiserslautern, Germany — 2Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
Magneto-plasmonics offer unique possibilities to manipulate light by the use of external magnetic fields. The magnetic field can provide the means to control surface plasmons polaritons (SPPs), as it has been predicted for noble metals, and explored experimentally in hybrid structures composed of noble and magnetic metals/dielectrics. However no study has been devoted to pure magnetic metals. Here, we present the case of a pure magnetic metal, such as Ni patterned in a two-dimensional hexagonal lattice. The patterned Ni thin film supports the excitation of SPPs both at the air/Ni interface and Ni/substrate interface. The dispersion relation of SPPs defined by the hexagonal pattern can be modified with an application of a transverse magnetic field. This is revealed by the modulated reflectivity measured by the Transverse Magneto-optic Kerr Effect (TMOKE). The perspective of developing new ways to use combined magnetic field, magneto-optic and surface plasmon effects for manipulation of light is addressed.