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Spatial nonlinearity in anisotropic metamaterial plasmonic slot waveguides

Mahmoud M. R. Elsawy 1 Gilles Renversez 1, *
* Corresponding author
1 ATHENA - ATHENA
FRESNEL - Institut FRESNEL
Abstract : We study the main nonlinear solutions of plasmonic slot waveguides made from an anisotropic metamate-rial core with a positive Kerr-type nonlinearity surrounded by two semi-infinite metal regions. First, we demonstrate that for a highly anisotropic diagonal elliptical core, the bifurcation threshold of the asymmetric mode is reduced from GW/m threshold for the isotropic case to 50 MW/m one indicating a strong enhancement of the spatial nonlinear effects, and that the slope of the dispersion curve of the asymmetric mode stays positive, at least near the bifurcation, suggesting a stable mode. Second, we show that for the hyperbolic case there is no physically meaningful asymmetric mode, and that the sign of the effective nonlinearity can become negative.
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https://hal-amu.archives-ouvertes.fr/hal-01360397
Contributor : Gilles Renversez <>
Submitted on : Tuesday, September 6, 2016 - 3:02:57 PM
Last modification on : Thursday, January 23, 2020 - 6:22:16 PM
Long-term archiving on: : Wednesday, December 7, 2016 - 12:23:19 PM

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  • HAL Id : hal-01360397, version 1

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Mahmoud M. R. Elsawy, Gilles Renversez. Spatial nonlinearity in anisotropic metamaterial plasmonic slot waveguides. 2016. ⟨hal-01360397⟩

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