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Updated: Jun 22, 2026

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

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Published on: July 21, 2018

Curved long-range surface plasmon-polariton waveguides.

Pierre Berini, Junjie Lu

|June 9, 2009

Summary

Long-range surface plasmon-polariton modes can propagate in curved metal film waveguides. This study confirms that these structures are compatible with bending, even at small radii of curvature.

Area of Science:

Optics and Photonics
Materials Science

Background:

Surface plasmon-polariton (SPP) modes are crucial for nanoscale light manipulation.
The propagation characteristics of SPPs in curved structures are not fully understood.
Long-range SPPs offer potential for enhanced light confinement and propagation distances.

Purpose of the Study:

To investigate the propagation of long-range surface plasmon-polariton (LRSPP) modes in curved thin metal film waveguides.
To determine the feasibility of using curved waveguides for LRSPP propagation.
To assess the impact of curvature on LRSPP mode characteristics.

Main Methods:

Modeling LRSPP propagation in curved thin metal film waveguides using cylindrical coordinates.
Employing a rigorous vectorial numerical method for accurate simulation.

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Implementing an absorbing boundary condition to manage radiation at the bend.

Main Results:

LRSPP modes can successfully propagate in curved metal film waveguides.
The study confirms that long-range structures are compatible with bending.
Reasonably small radii of curvature can be utilized without significant mode degradation.

Conclusions:

Curved waveguides are a viable platform for supporting long-range surface plasmon-polariton propagation.
The findings open possibilities for integrated photonic devices utilizing bent plasmonic structures.
This research contributes to the understanding of wave propagation in complex plasmonic geometries.