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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Vacuum Rabi splitting and strong-coupling dynamics for surface-plasmon polaritons and rhodamine 6G molecules
T K Hakala1, J J Toppari, A Kuzyk
1Nanoscience Center, Department of Physics, University of Jyväskylä, Finland.
Physical Review Letters
|October 2, 2009
Summary
We achieved strong coupling between surface-plasmon polaritons (SPP) and Rhodamine 6G (R6G) molecules, demonstrating tunable Rabi splitting. This opens new avenues for controlling light-matter interactions in hybrid systems.
Area of Science:
- Plasmonics and photonics
- Quantum optics
- Materials science
Background:
- Strong light-matter coupling is crucial for quantum technologies.
- Surface-plasmon polaritons (SPPs) offer enhanced light-matter interactions at the nanoscale.
- Rhodamine 6G (R6G) is a widely used organic dye for optical studies.
Purpose of the Study:
- To investigate strong coupling between SPPs and R6G molecules.
- To demonstrate control over the Rabi splitting in a hybrid SPP-exciton system.
- To explore the dynamics of the coupled system beyond conventional reflectometry.
Main Methods:
- Fabrication of a waveguide structure for SPP propagation.
- Deposition of Rhodamine 6G (R6G) molecules on the waveguide.
- Optical characterization using emission spectroscopy and reflectometry.
- Lithographic control of R6G area to tune interaction time.
Main Results:
- Achieved double vacuum Rabi splitting energies up to 230 and 110 meV.
- Observed emission from all three energy branches of the coupled system.
- Demonstrated tunable Rabi splitting by controlling SPP-R6G interaction time with sub-femtosecond precision.
Conclusions:
- Strong coupling between SPPs and R6G is feasible and controllable.
- Emission spectroscopy provides deeper insights into hybrid system dynamics.
- Tunable Rabi splitting can be achieved via lithographic control of interaction length.
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