Real-space imaging of nanotip plasmons using electron energy loss spectroscopy

Benjamin Schröder, Thorsten Weber, Sergey V. Yalunin, Thomas Kiel, Christian Matyssek, Murat Sivis, Sascha Schäfer, Felix von Cube, Stephan Irsen, Kurt Busch, Claus Ropers, and Stefan Linden

Phys. Rev. B 92, 085411 – Published 10 August 2015

Abstract

We report the spatial mapping of surface plasmons on conical gold nanotips by electron energy loss spectroscopy. We observe standing-wave patterns resulting from reflections of the fundamental surface-plasmon mode at the nanotip apex. The experimental results are in very good agreement with numerical calculations using the discontinuous Galerkin time-domain method and analytical computations based on a cylindrical mode expansion.

Received 22 May 2015

DOI:https://doi.org/10.1103/PhysRevB.92.085411

Authors & Affiliations

Benjamin Schröder¹, Thorsten Weber^2,3, Sergey V. Yalunin¹, Thomas Kiel⁴, Christian Matyssek⁴, Murat Sivis¹, Sascha Schäfer¹, Felix von Cube^2,3, Stephan Irsen³, Kurt Busch^4,5, Claus Ropers^1,*, and Stefan Linden^2,†

¹4th Physical Institute – Solids and Nanostructures, University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany
²Physikalisches Institut, Rheinische Friedrich-Wilhelms-Universität Bonn, Nußallee 12, 53115 Bonn, Germany
³Electron Microscopy and Analytics, Center of Advanced European Studies and Research, Ludwig-Erhard-Allee 2, 53175 Bonn, Germany
⁴Institut für Physik, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin, Germany
⁵Max-Born-Institut, Max-Born-Straße 2A, 12489 Berlin, Germany

^*cropers@gwdg.de
^†linden@physik.uni-bonn.de

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Issue

Vol. 92, Iss. 8 — 15 August 2015

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