A.Abdur Rahman Akib

To achieve berry phase I needed to use circularly polarized light, from a post in the forum I've came to know that lumerical can not calculate circularly polarized lights phase directly. 

Therefore first I ran the simulation for polarization angle 0 then 90 degree then took the phase difference of S.S21_Gn from angle 0 - angle 90

Is this the right approach? But I am still not getting proper results.