Exact calculation of the nonlinear characteristics of 2D isotropic and anisotropic waveguides
Résumé
We use our vector Maxwell’s nonlinear eigenmode solver to
study the stationary solutions in 2D cross-section plasmonic
slot waveguides with isotropic Kerr nonlinear codes and
anisotropic Kerr nonlinear cores. First, for the isotropic case,
we demonstrate that, even in the low-power regime, 1D stud-
ies may not provide accurate and meaningful results compared
to 2D ones. Second, we study, including at high powers, the
link between the nonlinear parameter γ nl and the change of
the nonlinear propagation constant Δβ. Third, we demon-
strate that our approach is also valid for anisotropic wave-
guides, and we show how to improve by, a factor of 2, the
figure of merit of nonlinear plasmonic slot waveguides using
realistic materials.