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Updated: May 5, 2026
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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Plasmonic surface lattice resonances at the strong coupling regime
A I Väkeväinen1, R J Moerland, H T Rekola
1COMP Centre of Excellence, Department of Applied Physics, Aalto University , FI-00076 Aalto, Finland.
Nano Letters
|November 28, 2013
Summary
Strong coupling was observed between surface lattice resonances (SLRs) and organic dye molecules in plasmonic nanoarrays. This interaction, dependent on molecule concentration, reveals coherent coupling between distant nanoparticles.
Area of Science:
- Plasmonics
- Molecular Spectroscopy
- Nanophotonics
Background:
- Plasmonic nanoarrays exhibit complex optical resonances.
- Organic dye molecules can interact with plasmonic excitations.
- Understanding strong coupling is crucial for advanced optical devices.
Purpose of the Study:
- To investigate strong coupling in plasmonic nanoarrays involving surface lattice resonances (SLRs) and organic dye molecules.
- To analyze the concentration-dependent transmission spectra of these coupled systems.
- To elucidate the nature of coupling between molecules and collective plasmonic modes.
Main Methods:
- Experimental measurements of transmission spectra.
- Finite-difference time-domain (FDTD) simulations.
- Coupled-dipole approximation and coupled-modes models.
- Fano theory analysis.
Main Results:
- Observed strong coupling between SLRs, localized surface plasmon resonances, and molecular excitations.
- Transmission spectra showed concentration-dependent splitting, indicative of strong coupling.
- Delocalized SLR modes suggest coherent coupling between molecules on distant nanoparticles.
Conclusions:
- Strong coupling is achievable in plasmonic nanoarrays with organic molecules.
- The collective and delocalized nature of SLRs facilitates long-range coherent interactions.
- This work provides insights into controlling light-matter interactions at the nanoscale.
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