Scattering-induced amplification of two-dimensional plasmons: Electromagnetic modeling
- 9 June 2021
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 129 (22), 223103
- https://doi.org/10.1063/5.0050053
Abstract
Using two rigorous electromagnetic approaches, we study plasmon scattering in two-dimensional systems and show that plasmon amplification is possible in the presence of dc currents. Two scenarios are considered: plasmon scattering from an interface between different two-dimensional channels and plasmon reflection from electric contacts of arbitrary thickness. In each case, the effect of a dc current of the plasmon reflection and transmission coefficients and the plasmon power are both quantified. A resonant system is studied where plasmon roundtrip gain may exceed unity, showing the possibility of plasmon generation.Keywords
Funding Information
- Engineering and Physical Sciences Research Council (EP/R004994/1)
- Engineering and Physical Sciences Research Council (EP/R00501X/1)
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