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Updated: Jul 12, 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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Plexcitonic optical chirality in the chiral plasmonic structure-microcavity-exciton strong coupling system
Optics Express
|October 20, 2023
Summary
This study introduces a novel three-mode chiral plexcitonic system for advanced chiroptical devices. The system demonstrates enhanced chiral transfer and tunable optical responses, offering a new pathway for chiral sensing applications.
Area of Science:
- Plasmonics and Nanophotonics
- Chiroptical Spectroscopy
- Materials Science
Background:
- Chiral plexcitonic systems offer unique chiroptical properties for device applications.
- Existing research primarily focuses on two-mode coupling, limiting modulation complexity.
- Multiple-mode coupling can lead to richer and more controllable optical responses.
Purpose of the Study:
- To propose and investigate a novel three-mode coupling system for enhanced chiroptical phenomena.
- To explore the potential of this system for chiral transfer and tunable optical modulation.
- To provide a feasible strategy for developing advanced chiral sensing and modulation devices.
Main Methods:
- Utilized the finite element method (FEM) to analyze the optical response of the hybrid system.
- Investigated strong coupling between a chiral gold (Au) helices array, a Fabry-Pérot cavity, and monolayer tungsten diselenide (WSe2).
- Employed the coupled oscillator model to determine plexciton energies and Hopfield coefficients.
Main Results:
- Observed mode splitting in the circular dichroism (CD) spectrum, confirming the shift of chiroptical response to three plexciton branches.
- Demonstrated successful chiral transfer through strong coupling within the three-mode system.
- Showcased tunability of the system's optical response by adjusting temperature and helix array period.
Conclusions:
- The proposed three-mode chiral plexcitonic system provides an effective platform for enhanced chiral transfer and modulation.
- This system offers a wider tunable region and more tuning methods compared to two-mode systems.
- The findings present a viable strategy for the development of sophisticated chiral sensing and modulation devices.
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