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Updated: Oct 1, 2025
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
6.9K
Polariton Dynamics in Two-Dimensional Ruddlesden-Popper Perovskites Strongly Coupled with Plasmonic Lattices
Jeong-Eun Park1, Rafael López-Arteaga1, Alexander D Sample1
1Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States.
ACS Nano
|March 2, 2022
Summary
Strong coupling creates exciton-polaritons in perovskites. These hybrid states exhibit faster dynamics and shorter lifetimes than excitons, influenced by energy transfer pathways.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Optics
Background:
- Strong light-matter coupling generates hybrid eigenstates called exciton-polaritons.
- Understanding polariton relaxation pathways is crucial but underexplored.
Purpose of the Study:
- Investigate the dynamics of hybridized states in 2D Ruddlesden-Popper perovskites coupled to plasmonic nanoparticle lattices.
- Explore relaxation pathways in different coupling regimes.
Main Methods:
- Utilized an open cavity architecture with Aluminum (Al) nanoparticle lattices.
- Modulated coupling strength via perovskite film thickness and superstrate refractive index.
- Employed fs-transient absorption spectroscopy and finite-difference time-domain (FDTD) simulations.
Main Results:
- Observed avoided crossings, a signature of strong coupling, in optical dispersion diagrams.
- An analytical model correlated exciton/plasmon mixing ratio with coupling strength.
- Found that upper and lower polaritons possess shorter lifetimes than excitons.
Conclusions:
- Exciton-polaritons demonstrate altered dynamics compared to bare excitons.
- Polaritons can exhibit accelerated excited-state dynamics through additional energy transfer channels.
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