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Updated: Jul 8, 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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Bandwidth of quantized surface plasmons: competition between radiative and nonradiative damping effects
Samar Moustafa1,2, Mohamed K Zayed1,3, Moustafa Ahmed4
1Physics Department, College of Science, Taibah University, P. O. Box 30002, Medina, Saudi Arabia. fareshesham@gmail.com.
Physical Chemistry Chemical Physics : PCCP
|December 20, 2023
Summary
We studied how electron oscillations affect nanoparticle plasmon resonance bandwidth. Minimizing damping through optimized parameters is crucial for advanced sensing and medical applications.
Area of Science:
- Quantum optics
- Plasmonics
- Nanotechnology
Background:
- Nanoparticle plasmon resonance is influenced by electron oscillations.
- Total relaxation time includes radiative and nonradiative processes.
- Understanding damping is key for applications.
Purpose of the Study:
- Investigate damping effects on quantized nanoparticle plasmon resonance bandwidth.
- Analyze competition between radiative and nonradiative damping.
- Identify parameters for narrower plasmon bandwidth.
Main Methods:
- Treating nanoparticles as two-level quantum systems.
- Using optical Bloch equations and density matrix formalism.
- Suggesting a criterion for dipole approximation validity.
Main Results:
- Coherent electron oscillations significantly impact plasmon bandwidth.
- Resonance frequency and nanoparticle size are critical factors.
- Optimized parameters yield narrower plasmon bandwidths.
Conclusions:
- Damping mechanisms are influenced by resonance frequency factors.
- Identified optimal parameters for minimal damping in nanospheres and nanoshells.
- Theoretical model aligns with experimental results for single NPs and predicts trends for ensembles.
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