Reply To: Custom light source profile and partial coherence light source in Ansys FDTD

[Guilin Sun]

This is normal to compare the simulated results with experiment or publications: 

Ansys Insight: Why my simulation result is different from published paper or experiment?

In your case, you can use stackrt: stackrt - Script command since it is thin-film device without other nano structures.

In FDTD the phase is very senstive to the mesh accuracy, and the source/monitor locations.you can place both the source and the monitor as close to the device as possible to reduce the numerical errors.