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Updated: Jun 5, 2025
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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
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Subradiant plasmonic cavities make bright polariton states dark
Ju Eun Yim1, Zachary T Brawley2, Matthew T Sheldon3
1Department of Chemistry, Texas A&M University, College Station, USA.
Nanophotonics (Berlin, Germany)
|December 5, 2024
Summary
This study investigates vibrational strong coupling (VSC) using dark quadrupolar plasmonic resonances (QPLs), revealing unique hybrid polariton states. This contrasts with bright cavities, offering new ways to study normally "dark" molecular states.
Area of Science:
- Plasmonics and Nanophotonics
- Molecular Spectroscopy
- Quantum Optics
Background:
- Nanostructured plasmonic surfaces enable precise control of light-matter interactions.
- Vibrational strong coupling (VSC) involves interactions between molecular vibrations and optical cavities.
- Subradiant "dark" cavities, like quadrupolar plasmonic resonances (QPLs), offer unique coupling properties.
Purpose of the Study:
- To explore VSC between molecular ensembles and infrared QPLs.
- To investigate the influence of cavity mode symmetry on VSC properties.
- To probe normally "dark" molecule-like states in VSC.
Main Methods:
- Fabrication of QPL nanostructured surfaces.
- Deposition of polymethyl methacrylate (PMMA) thin films.
- Infrared (IR) spectroscopy measurements.
- Computational analysis of polariton states.
Main Results:
- VSC was achieved with QPLs, exhibiting "dark" subradiant polariton states and "bright" collective molecular states.
- The observed behavior is opposite to conventional VSC with "bright" cavities.
- Reduction in molecular absorption and spectral signatures of VSC were confirmed.
- VSC with dipolar plasmonic resonances (DPLs) showed conventional behavior.
Conclusions:
- Cavity mode symmetry significantly modifies VSC resultant states.
- QPLs provide a platform for studying spectrally "dark" N-1 molecule-like states.
- This work opens new avenues for exploring fundamental aspects of light-matter interactions in nanophotonics.
Keywords:
bound states in the continuumdark plasmonpolariton chemistrystrong couplingvibrational strong couplingvibropolaritonsMore Related Videos
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