Related Experiment Video
Updated: Nov 16, 2025

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Collective strong coupling in a plasmonic nanocavity.
H Varguet1, A A Díaz-Valles1, S Guérin1
1Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), UMR 6303 CNRS, Université Bourgogne Franche-Comté, 9 Avenue Savary, BP 47870, 21078 Dijon Cedex, France.
Quantum plasmonics enables nanoscale cavity quantum electrodynamics (cQED) by leveraging plasmonic nanocavities. This study reveals deviations from standard laws in collective strong coupling, impacting Rabi splitting and quantum emission spectra.
Area of Science:
- Quantum optics
- Plasmonics
- Nanophotonics
Background:
- Cavity quantum electrodynamics (cQED) principles are extended to the nanoscale using plasmonic nanocavities.
- Strong subwavelength confinement of plasmon modes in metal nanostructures is key.
Purpose of the Study:
- To detail collective strong coupling phenomena in plasmonic nanocavities.
- To compare and contrast these phenomena with traditional cQED.
- To investigate deviations from established theoretical laws.
Main Methods:
- Theoretical analysis of collective strong coupling.
- Investigation of plasmonic nanocavity properties.
- Examination of quantum electrodynamic effects at the nanoscale.
Main Results:
- Observed significant deviations in Rabi splitting from the standard NeΔΩ1 law.
- Identified the collective Lamb shift as a crucial factor.
- Analyzed the influence of quantum corrections on emission spectra.
Conclusions:
- Collective strong coupling in plasmonic nanocavities exhibits unique characteristics compared to cQED.
- Standard theoretical models may require modification for nanoscale plasmonic systems.
- Quantum effects play a critical role in understanding light-matter interactions at the nanoscale.
Related Concept Videos
¹H NMR: Long-Range Coupling
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
Standing Waves in a Cavity
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
Spin–Spin Coupling: One-Bond Coupling
Spin–Spin Coupling Constant: Overview
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...

