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Updated: Mar 17, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Edge Mode Coupling within a Plasmonic Nanoparticle
Franz-Philipp Schmidt1,2, Harald Ditlbacher1, Andreas Hohenau1
1Institute of Physics, University of Graz , 8010 Graz, Austria.
Abstract:
The coupling of plasmonic nanoparticles can strongly modify their optical properties. Here, we show that the coupling of the edges within a single rectangular particle leads to mode splitting and the formation of bonding and antibonding edge modes. We are able to unambiguously designate the modes due to the high spatial resolution of electron microscopy-based electron energy loss spectroscopy and the comparison with numerical simulations. Our results provide simple guidelines for the interpretation and the design of plasmonic mode spectra.
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