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Updated: Jan 7, 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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Optimizing Strong Coupling of Plasmon-Exciton Hybrids for Largely Enhancing Luminescence
Zhen-Long Dou1,2, Qin-Xing Zhou2,3, Xiao-Kang Zhong1
1Key Laboratory of Artificial Micro- and Nano-Structures of the Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China.
Nano Letters
|December 8, 2025
Summary
We enhanced two-photon luminescence (TPL) in Cy5@AgAl hybrids by optimizing plasmon-exciton coupling. This strategy boosts light emission, offering potential for advanced photonic nanodevices.
Area of Science:
- Plasmonics and nanophotonics
- Quantum optics and excitonics
Background:
- Strong coupling between plasmons and excitons creates hybridized resonances, impacting light absorption and scattering.
- However, this strong coupling often leads to diminished luminescence efficiency.
Purpose of the Study:
- To significantly enhance two-photon luminescence (TPL) in Cy5@AgAl hybrid nanostructures.
- To investigate the relationship between radiative plasmon/exciton resonance strengths and coupling efficiency on TPL.
Main Methods:
- Fabrication of Cy5@AgAl hybrid nanostructures.
- Experimental measurement of two-photon luminescence (TPL) under varying conditions.
- Development of a linear response theoretical model to analyze optical properties.
Main Results:
- Achieved a maximum TPL enhancement factor of 253 by tuning plasmon (αp) and exciton (αc) resonance strengths and coupling efficiency (β).
- Identified optimal conditions where ensemble excitons exhibit strong coupling with plasmons.
- Theoretical model revealed spectral repartitioning due to hybridized interference, attributing maximal radiative enhancement to optimized interference (βαpαc).
Conclusions:
- Demonstrated a method to substantially improve TPL in hybrid nanostructures by optimizing plasmon-exciton interactions.
- The findings provide a pathway for designing high-performance photonic nanodevices, including nanoantennas and quantum information processors.
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