Regensburg 2010 – scientific programme
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O: Fachverband Oberflächenphysik
O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)
O 59.39: Poster
Wednesday, March 24, 2010, 17:45–20:30, Poster B1
Simulation of the behaviour of surface plasmon polaritons on C3 symmetric nano-holes arranged as C4 symmetric arrays — •David Leipold, Stephan Schwieger, and Erich Runge — Institut für Physik und Institut für Mikro- und Nanotechnologien, Technische Universität Ilmenau
Surface plasmon polaritons (SPPs) can couple to propagating light, e.g., via a grating. We perform FDTD simulations to obtain insight into the coupling via arrays of nano-holes cut into a silver film. In particular, we investigate the influence of nano-holes with three-fold symmetry, which is incompatible with the four-fold symmetry of the whole array. These studies are motivated by earlier experiments[1] that revealed unexpected dependencies of the reflectivity on the direction and the polariziation of the incident light. Our simulations reproduce many aspects of these findings and give insight into the behaviour of the near fields and, in particular, their relation to the excitation of SPPs.
[1] B. Ashall, M. Berndt, and D. Zerulla, App. Phys. Lett. 91, 203109 (2007)