Dear Mr. Newman,
Thank you for your attention.
My structure, in general, is three dimensional, its cross section as you mentioned is in the x-z plane and propagation is along the y axis.
The problem is that I want to introduce anisotropic refractive indices along x and z directions. I need that along x axis, the refractive index to be a Gaussian profile and along z axis it has an exponential profile. Along propagation direction (y axis) the refractive index is a constant value.
So for clarification I would like to inform you that:
1- my design is 3D.
2- Cross section is in the x-z plane and propagation is along y axis.
3- I need a Gaussian refractive index profile along x axis and an exponential profile along z axis while along propagation direction (y axis) a constant refractive index must be set.
Thank you so much for your time.