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arXiv · 1703.09291

A near-field study on the transition from localized to propagating plasmons on 2D nano-wedges

Thorsten Weber·Thomas Kiel·Stephan Irsen·Kurt Busch·Stefan Linden
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Abstract

In this manuscript we report on a near-feld study of two-dimensional plasmonic gold nano-wedges using electron energy loss spectroscopy in combination with scanning transmission electron microscopy, as well as discontinuous Galerkin time-domain computations. With increasing nano-wedge size, we observe a transition from localized surface plasmons on small nano-wedges to non-resonant propagating surface plasmon polaritons on large nano-wedges. Furthermore we demonstrate that nano-wedges with a groove cut can support localized as well as propagating plasmons in the same energy range.

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Thorsten Weber, Thomas Kiel, Stephan Irsen, Kurt Busch, Stefan Linden. 2017-03-27. A near-field study on the transition from localized to propagating plasmons on 2D nano-wedges. https://doi.org/10.1364/oe.25.016947

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