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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Spontaneous emission in paired graphene plasmonic waveguide structures.
Lei Zhang1, Xiuli Fu, Mei Zhang
1School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China. leizhangss@bupt.edu.cn
Optics Express
|April 11, 2013
Summary
Researchers studied surface plasmon coupling in paired graphene structures. They found strong emitter emission enhancement in paired graphene layers and ribbons, especially at low photon energies and narrow ribbon widths.
Area of Science:
- Plasmonics
- Condensed Matter Physics
- Nanotechnology
Background:
- Surface plasmons are collective electron oscillations on conductive surfaces.
- Graphene exhibits unique electronic and optical properties, making it suitable for plasmonic applications.
- Controlling light-matter interactions at the nanoscale is crucial for advanced optical devices.
Purpose of the Study:
- To investigate the coupling between single emitters and surface plasmons in paired graphene layers and ribbons.
- To determine the factors influencing emitter emission enhancement and surface plasmon excitation efficiency.
- To explore the potential of paired graphene structures for improving light-matter interactions.
Main Methods:
- Numerical simulations were employed to model the optical properties of paired graphene structures.
- The coupling strength between a single emitter and surface plasmons was analyzed.
- The effects of photon energy, gap distance, and ribbon width on emission enhancement were investigated.
Main Results:
- Strong coupling between surface plasmons in paired graphene layers was observed at low photon energies and small inter-layer gaps.
- Nearly unity excitation efficiency of surface plasmons by a single emitter was achieved in paired graphene layers.
- Emission enhancement in paired graphene layers decreased with increasing photon energy.
- Similar emission enhancement and high surface plasmon excitation efficiency were found in graphene paired ribbons.
- Narrowing the ribbon width improved both emission enhancement and surface plasmon excitation efficiency.
Conclusions:
- Paired graphene layers and ribbons offer significant potential for enhancing light-emitter interactions.
- The design of graphene nanostructures, such as ribbon width and layer spacing, can be optimized to control plasmonic coupling.
- These findings could pave the way for novel optoelectronic devices with enhanced light manipulation capabilities.
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