I’m working with the anisotropic permittivity rotation as detailed in this example link. With this approach I’m applying a spatially varying permittivity rotation across a 2D waveguide cross-section. While it is working in the FDE mode calculation (i.e. the output mode profile and neff are clearly affected by applying a ‘grid attribute name’, and in the expected fashion), the index_x, index_y plots do not show the effect of the spatial variation applied by the grid attribute in the index data.
Is there a way to force the effect of the permittivity rotation to appear in the index monitor?