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arXiv · 1601.07689

Gap plasmonics of silver nanocube dimers

Dario Knebl·Anton Hörl·Andreas Trügler·Johannes Kern·Joachim R. Krenn·Peter Puschnig·Ulrich Hohenester
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Abstract

We theoretically investigate gap plasmons for two silver nanocubes coupled through a molecular tunnel junction. In absence of tunneling, the red-shift of the bonding mode saturates with decreasing gap distance. Tunneling at small gap distances leads to a damping and slight blue-shift of the bonding mode, but no low-energy charge transfer plasmon mode appears in the spectra. This finding is in stark contrast to recent work of Tan et al. [Science 343, 1496 (2014)].

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Dario Knebl, Anton Hörl, Andreas Trügler, Johannes Kern, Joachim R. Krenn, Peter Puschnig, Ulrich Hohenester. 2016-01-28. Gap plasmonics of silver nanocube dimers. https://doi.org/10.1103/physrevb.93.081405

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