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Updated: Jun 13, 2025
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Evaluating Plasmonic Transport in Current-carrying Silver Nanowires
Published on: December 11, 2013
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Drifting plasmons in two-dimensional electron channels: circuit analogy
1Department of Electrical and Electronic Engineering, Imperial College London , London SW7 2AZ, UK.
Summary
This study presents a circuit model for terahertz plasmons in gated channels with DC current. It demonstrates non-reciprocity and instability, enabling new device designs.
Area of Science:
- Condensed matter physics
- Terahertz technology
- Plasmonics
Background:
- Plasmons in two-dimensional electron channels are key for terahertz applications.
- Equivalent circuit models simplify plasmon analysis.
Purpose of the Study:
- To introduce a circuit model for plasmons in gated channels with DC current.
- To analyze the behavior of drifting plasmons and demonstrate instabilities and non-reciprocity.
Main Methods:
- Development of an LC-transmission line model with distributed dependent sources.
- Analysis of lumped-element transmission lines with dependent sources.
- Demonstration of circuit analogues for Dyakonov-Shur instability and non-reciprocity.
Main Results:
- Drifting plasmons are accurately described by the proposed transmission line model.
- A circuit analogue of the Dyakonov-Shur instability was successfully demonstrated.
- Non-reciprocity was shown in both right- and left-handed transmission line configurations.
Conclusions:
- The developed circuit model effectively describes plasmons in DC-biased 2D electron channels.
- The findings facilitate the design of novel non-reciprocal transmission line devices for terahertz applications.
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