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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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Plasmon transmission through excitonic subwavelength gaps
Maxim Sukharev1, Abraham Nitzan2
1Science and Mathematics Faculty, College of Letters and Sciences, Arizona State University, Mesa, Arizona 85212, USA.
The Journal of Chemical Physics
|April 17, 2016
Summary
We investigated electromagnetic energy transfer between nanorods. Strong coupling occurs, with transmission split by plasmon modes, significantly altered by resonant molecules enhancing exciton-plasmon coupling.
Area of Science:
- Plasmonics
- Nanophotonics
- Electromagnetism
Background:
- Investigating electromagnetic energy transfer across subwavelength gaps is crucial for nanoscale device development.
- Co-axial metal nanorods exhibit strong coupling behavior due to longitudinal plasmons.
Purpose of the Study:
- To study electromagnetic energy transfer across a subwavelength gap between co-axial metal nanorods.
- To analyze the influence of geometrical parameters on plasmon coupling.
- To investigate the effect of resonant and off-resonant emitters on energy transfer.
Main Methods:
- Numerical simulation of electromagnetic energy transfer.
- Analysis of transmission spectra as a function of frequency and geometry.
- Inclusion of 2-level emitters in the gap to study exciton-plasmon coupling.
Main Results:
- Transmission is dominated by a split longitudinal plasmon peak (bonding and antibonding modes).
- Mode spectrum shows anti-crossing behavior with varying rod length, dependent on gap width.
- Resonant molecules strongly modify transmission, exhibiting strong exciton-plasmon coupling, particularly near the bonding mode.
Conclusions:
- The system exhibits strong coupling between longitudinal plasmons in co-axial nanorods.
- Resonant molecules significantly alter electromagnetic energy transfer and field distribution across the junction.
- Exciton-plasmon coupling is a key phenomenon influencing energy transfer in nanorod systems.
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