Spatial nonlinearity in anisotropic metamaterial plasmonic slot waveguides
Abstract
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 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.
Keywords
Cite
@article{arxiv.1609.01578,
title = {Spatial nonlinearity in anisotropic metamaterial plasmonic slot waveguides},
author = {Mahmoud M. R. Elsawy and Gilles Renversez},
journal= {arXiv preprint arXiv:1609.01578},
year = {2018}
}
Comments
8 pages, 7 figures, submitted