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Article Dans Une Revue Plasmonics Année : 2018

Spatial Nonlinearity in Anisotropic Metamaterial Plasmonic Slot Waveguides

Mahmoud Elsawy
Gilles Renversez

Résumé

We study the main nonlinear solutions of plasmonic slot waveguides made from an anisotropic metamaterial 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 the GW/m level for the isotropic case to 50 MW/m level indicating a strong enhancement of the spatial nonlinear effects. In addition, the slope of the dispersion curve for the asymmetric mode remains 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.

Dates et versions

hal-02507010 , version 1 (12-03-2020)

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Mahmoud Elsawy, Gilles Renversez. Spatial Nonlinearity in Anisotropic Metamaterial Plasmonic Slot Waveguides. Plasmonics, 2018, 13 (3), pp.971-979. ⟨10.1007/s11468-017-0595-0⟩. ⟨hal-02507010⟩
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