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Updated: Jun 22, 2026
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
How grooves reflect and confine surfaceplasmon polaritons
Martin Kuttge1, F Javier García de Abajo, Albert Polman
1Center for Nanophotonics, FOM-Institute AMOLF, XG Amsterdam, The Netherlands. kuttge@amolf.nl
Optics Express
|June 10, 2009
Summary
Researchers studied surface plasmon polaritons reflection from gold surfaces with deep grooves. Groove dimensions significantly tune reflectivity, enabling potential applications in optical devices.
Area of Science:
- Plasmonics
- Nanophotonics
- Surface Science
Background:
- Surface plasmon polaritons (SPPs) are electromagnetic waves confined to metal-dielectric interfaces.
- Controlling SPP reflection is crucial for developing advanced optical devices.
- Deep metallic grooves offer a platform for manipulating SPP behavior.
Purpose of the Study:
- To investigate the reflection of SPPs by deep linear grooves in gold surfaces.
- To understand how groove geometry influences SPP reflection characteristics.
- To explore the potential for tuning reflectivity through groove design.
Main Methods:
- Numerical simulations using the finite-difference-in-time-domain (FDTD) method.
- Boundary element method (BEM) calculations for electromagnetic field analysis.
- Systematic variation of groove width (25 and 100 nm) and depth (up to 500 nm).
Main Results:
- SPP reflection is highly dependent on wavelength, groove depth, and width.
- Resonances in reflectivity are linked to the coupling of planar plasmon modes to groove cavity modes.
- Achieved tunable reflectivity up to 30% over narrow or wide wavelength bands.
Conclusions:
- Deep linear grooves provide an effective means to control SPP reflection.
- The observed resonances are attributed to mode coupling phenomena within the grooves.
- Careful design of groove parameters allows for tailored optical responses, with potential applications in nanophotonic devices.
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