Ansys Learning Forum Forums Discuss Simulation Photonics How to determine the position of DFT monitor on farfield scattering analysis ? Reply To: How to determine the position of DFT monitor on farfield scattering analysis ?

Kirill
Ansys Employee

First of all, if you use sources other than TFSF, you will capture a combination of incident and scattered waves, similar to what happens inside the Total-Field region of a TFSF source.
Second, the monitor should be positioned close enough to capture the full scattered field but far enough to avoid capturing evanescent (non-propagating) fields.

Best regards,
Kirill