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Preprints, Working Papers, ... Year : 2016

Spatial nonlinearity in anisotropic metamaterial plasmonic slot waveguides

Mahmoud M. R. Elsawy
Gilles Renversez
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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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Dates and versions

hal-01360397 , version 1 (06-09-2016)

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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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