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Updated: Jan 21, 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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Strong plasmon-molecule coupling at the nanoscale revealed by first-principles modeling
Tuomas P Rossi1, Timur Shegai1, Paul Erhart1
1Department of Physics, Chalmers University of Technology, 412 96, Gothenburg, Sweden.
Nature Communications
|July 28, 2019
Summary
Strong light-matter interactions are explored in nanoscale plasmon-molecule systems. Time-dependent density-functional theory predicts vacuum Rabi splitting, demonstrating cavity quantum electrodynamics in small resonators.
Area of Science:
- Quantum optics
- Solid state physics
- Quantum chemistry
Background:
- Strong light-matter interactions are crucial for quantum and nonlinear optics.
- Exploring these phenomena is theoretically challenging.
- Nanoscale polaritons in plasmon-molecule systems offer a tractable approach.
Purpose of the Study:
- To investigate nanoscale polaritons using ab initio methods.
- To demonstrate the applicability of time-dependent density-functional theory (TDDFT) in these systems.
- To predict and analyze vacuum Rabi splitting in plasmon-molecule hybrids.
Main Methods:
- Utilizing time-dependent density-functional theory (TDDFT) calculations.
- Simulating a system of an aluminum nanoparticle interacting with benzene molecules.
- Applying cavity quantum electrodynamics principles to nanoscale resonators.
Main Results:
- TDDFT successfully accesses the physics of nanoscale plasmon-molecule hybrids.
- Vacuum Rabi splitting was predicted in the simulated system.
- Cavity quantum electrodynamics was shown to be valid for resonators as small as a few cubic nanometers.
- A single-molecule coupling strength exceeding 200 meV was achieved.
Conclusions:
- Ab initio methods, specifically TDDFT, are suitable for studying nanoscale polaritons.
- Strong light-matter interactions and cavity quantum electrodynamics effects are observable at the nanoscale.
- Parameter-free theoretical studies of polaritonic systems are enabled, paving the way for new applications.
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