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Updated: Jun 23, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Efficient unidirectional ridge excitation of surface plasmons
I P Radko1, S I Bozhevolnyi, G Brucoli
1Institute of Sensors, Signals and Electrotechnics, University of Southern Denmark, Odense M, Denmark. ilr@sense.sdu.dk
Abstract:
Using leakage-radiation microscopy, we characterize the efficiency of unidirectional surface-plasmon excitation with periodic (800 nm) arrays of 130-nm-high and 330-nm-wide gold ridges on a thin gold film illuminated with a focused (5-microm-wide) laser beam. We demonstrate that, at the resonant wavelength of 816 nm, the excitation efficiency of > 0.4 can be obtained with >or= 5 ridges by adjusting the beam position. Conducting numerical simulations, we account for the experimental results and calculate the electric-field enhancement achieved near the gold surface.
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