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Updated: May 24, 2026

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Coherent emission from a disordered organic semiconductor induced by strong coupling with surface plasmons
S Aberra Guebrou1, C Symonds, E Homeyer
1LPMCN, Université de Lyon, Université Lyon 1 and CNRS, UMR 5586, Villeurbanne, France.
Strong coupling between molecular emitters and surface plasmons creates macroscopic coherent hybrid states. This phenomenon, crucial for coherent emission over large distances, was evidenced using interferometric experiments on J-aggregated dyes.
Area of Science:
- Plasmonics
- Molecular Spectroscopy
- Quantum Optics
Background:
- Disordered molecular systems coupled to plasmons exhibit unique optical properties.
- Surface plasmons offer a pathway to control light-matter interactions at the nanoscale.
Purpose of the Study:
- To investigate the formation of spatially coherent hybrid states in molecular-plasmon systems.
- To demonstrate the role of strong coupling in achieving macroscopic coherence.
Main Methods:
- Fabrication of a silver layer with J-aggregated dye molecules.
- Young-type interferometric experiments to probe coherence.
- Comparison between strong and weak coupling regimes.
Main Results:
- Evidence of spatially coherent hybrid states extending over macroscopic distances (microns).
- Coherent emission observed from distinct molecular emitters separated by several microns.
- Absence of coherence in the weak-coupling regime.
Conclusions:
- Strong coupling between molecular emitters and surface plasmons is essential for macroscopic coherence.
- Hybridization of molecules with plasmons leads to the formation of extended coherent states.
- This finding has implications for quantum information processing and nanoscale optics.
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