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Updated: Jun 23, 2025
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
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Toward Complete Optical Coupling to Confined Surface Polaritons.
Saad Abdullah1, Eduardo J C Dias1, Jan Krpenský1
1ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain.
ACS Photonics
|June 24, 2024
Summary
Engineered dipolar scatterers efficiently couple light to surface-plasmon polaritons. This breakthrough in nanophotonics overcomes wavelength mismatch challenges for improved device design.
Area of Science:
- Nanophotonics
- Plasmonics
- Optical Engineering
Background:
- Efficient optical coupling is crucial for nanophotonic devices.
- Current methods struggle with coupling efficiency due to wavelength mismatch.
Purpose of the Study:
- To demonstrate an efficient light-to-surface-plasmon polariton coupling scheme.
- To overcome limitations in existing nanophotonic coupling mechanisms.
Main Methods:
- Fabrication of gold disks on a silica spacer above a gold surface.
- Tuning spacer thickness to achieve resonance and optimize coupling.
- Experimental measurements and electromagnetic simulations.
Main Results:
- Achieved maximum light-to-plasmon coupling cross section of the order of the square of the light wavelength.
- Identified an optimum distance for coupling based on particle-surface interaction and dipole quenching.
- Experimental results align with analytical theory and simulations.
Conclusions:
- Optimally placed engineered scatterers offer a novel solution for in/out-coupling in nanophotonics.
- This method provides a flexible scheme for efficient light-polariton coupling.
- The findings pave the way for advanced nanophotonic device designs.
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