Regensburg 2010 – scientific programme

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DS: Fachverband Dünne Schichten

DS 41: [O] Plasmonics and Nanooptics VI (Joint Session DS/O/HL)

DS 41.1: Talk

Thursday, March 25, 2010, 15:00–15:15, H32

Surface plasmon polaritons on arrays of nanostructures with three-fold symmetry — •David Leipold, Stephan Schwieger, and Erich Runge — Institut für Physik und Institut für Mikro- und Nanotechnologien, Technische Universität Ilmenau

Surface plasmon polaritons (SPPs) are optical excitations that are confined to a metal-dielectric interface. They interact with propagating light if the metal is structured on the scale of the wavelength of the incident light. Here, we consider the coupling properties of quadratic 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 array. Our numerical results reproduce aspects of earlier experimental findings [1]. Namely, there are shifts in the SPP-related minima and maxima in the reflectivity of specific reflection orders as function of the polarization of the incident light.

[1] B. Ashall, M. Berndt, and D. Zerulla, App. Phys. Lett. 91, 203109 (2007)