Reply To: Effective indices of first two modes in SWG

[Guilin Sun]

You can use bandstructure to get effective index for sure. But you will need some understanding and scripting. bandstructure gives k (points not the real k) vs f, while for refractive index it is k0/k. you have to extract the data from band structure, it might not be every easy, since it is from 2D matrix from FDTD simulation.

Please make sure you simulate the mode you want.