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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

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Published on: July 21, 2018

Directional coupling in long-range dielectric-loaded plasmonic waveguides.

Vladimir A Zenin¹, Zhanghua Han, Valentyn S Volkov

¹Department of Technology and Innovation, University of Southern Denmark, Niels Bohrs Allé 1, Odense, Denmark. zenin@iti.sdu.dk

|April 11, 2013

Summary

This study explores directional couplers using long-range dielectric-loaded surface plasmon-polariton waveguides. Researchers found good agreement between experimental results and simulations for these plasmonic components.

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Area of Science:

Plasmonics
Nanophotonics
Waveguide technology

Background:

Surface plasmon-polariton waveguides offer unique light confinement properties.
Dielectric-loaded waveguides enhance propagation characteristics.
Telecom wavelength operation is crucial for optical communication applications.

Purpose of the Study:

To investigate directional couplers (DCs) based on long-range dielectric-loaded surface plasmon-polariton waveguides (LR-DLSPPWs).
To numerically and experimentally characterize LR-DLSPPWs at telecom wavelengths.
To assess the potential of LR-DLSPPWs for integrated plasmonic devices.

Main Methods:

Fabrication of LR-DLSPPWs using polymer ridges on gold stripes.
Design and simulation of DC structures with S-bends and parallel waveguides.
Experimental characterization using scanning near-field microscopy.
Comparison of experimental data with numerical simulations.

Main Results:

Experimental propagation length of ~400 µm achieved.
Measured S-bend loss of ~4 dB.
Determined coupling length of ~100 µm.
Good agreement between numerical simulations and experimental findings.

Conclusions:

LR-DLSPPWs demonstrate significant potential for developing advanced plasmonic components.
The characterized LR-DLSPPWs are suitable for integrated photonic circuits.
The findings validate the design and performance of these plasmonic waveguides.