Dresden 2014 – scientific programme
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O: Fachverband Oberflächenphysik
O 37: Posters: Plasmonics, Electronic Structure and Spin-Orbit Interaction, Semiconductor and Insulator Surfaces, Nanostructures
O 37.20: Poster
Tuesday, April 1, 2014, 18:30–22:00, P2
Transmission of surface plasmon polariton through nanometric constriction — •Golaleh Ghafoori1, Daniel Benner2, Johannes Boneberg3, Paul Leiderer4, and Elke scheer5 — 1golaleh.ghafoori@uni.konstanz.de — 2daniel.benner@uni.konstanz.de — 3University of Konstanz — 4University of Konstanz — 5University of Konstanz
We study the excitation and propagation of surface plasmons polariton (SPPs) on a 4 micrometer wide gold stripe of thickness about 100nm. For the excitation we use an optimized grating in the stripe. The surface plasmons propagate towards and across a constriction. We show that SPPs are transmitted with high probability across a constriction, with smallest lateral dimensions of atomic. For comparison we performed FDTD(Finite Difference Time Domain) simulations with Lumerical. We model a supported gold stripe in the same geometrical arrangement as the sample. These studies allow the determination of local intensities in experiments with mechanically controllable break-junctions under light irradiation [1].