Guilin Sun
Ansys Employee
If the phase is space dependent, you will need to create a such source with the phase. Please refer this example: https://optics.ansys.com/hc/en-us/articles/360034383054-Using-an-equation-to-define-the-spatial-field-profile-of-a-source-in-FDTD
The source amplitude can be uniform or also space dependent.