Reply To: scattering calculation with gaussian beam in FDTD

[Guilin Sun]

The methodology is the same. However you will need to do two simulations: w/o the scatter, and their difference is the scattering fields (E &H). then you will need to manually calculate the power from the differential fields. https://innovationspace.ansys.com/forum/forums/topic/ansys-insight-custom-tfsf-source/ unforunately due to forum policy and website upgrades the sampled script screenshots were missing and I could not find the original file. so no script available now.

From my experience as long as the field intensity in front of the scatter is roughly uniform (eg, beam waist is roughly the scatter size), conventional result with TFSF source is about the same as a Gaussian beam.