TE waves in circular nonlinear optical antiwaveguide

Eigenvalues and eigenfunctions of TE₀₁ modes in a two-layer circular nonlinear optical waveguide are numerically investigated for various refractive index differences between the core and cladding and various values of the core radius. It is shown that for a negative difference between the refractive indices of the core and the cladding, there are possible regions which may be interpreted as stability regions for TE modes. In these regions the core diameter is small (of the order of light wavelength) and the longitudinal magnetic field is comparable with the transverse one