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Journal Article

Near-field study on the transition from localized to propagating plasmons on 2D nano-triangles

MPS-Authors

Weber,  Thorsten
Electron Microscopy and Analytics, Center of Advanced European Studies and Research (caesar), Max Planck Society;

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Irsen,  Stephan
Electron Microscopy and Analytics, Center of Advanced European Studies and Research (caesar), Max Planck Society;

External Resource

https://www.osapublishing.org/DirectPDFAccess/5FC4078E-F0F3-D993-1AAE2F404A4760E7_369121/oe-25-15-16947.pdf?da=1&id=369121&seq=0&mobile=no
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Fulltext (public)

1703.09291.pdf
(Publisher version), 8MB

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Citation

Weber, T., Kiel, T., Irsen, S., Busch, K., & Linden, S. (2017). Near-field study on the transition from localized to propagating plasmons on 2D nano-triangles. Optics Express, 25(15), 16947-16956. doi:10.1364/OE.25.016947.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-EACD-0
Abstract
In this manuscript we report on a near field study of two-dimensional plasmonic gold nano-triangles using electron energy loss spectroscopy in combination with scanning transmission electron microscopy, as well as discontinuous Galerkin time-domain computations. With increasing nano-triangle size, we observe a transition from localized surface plasmons on small nano-triangles to non-resonant propagating surface plasmon polaritons on large nano-triangles. Furthermore we demonstrate that nano-triangles with a groove cut can support localized as well as propagating plasmons in the same energy range.