Reply To: How to determine the position of DFT monitor on farfield scattering analysis ?

[Kirill]

Dear Subscriber,

In general, to obtain the scattered field alone and reproduce results similar to those from a TFSF source, you need to ensure that all other parameters in the simulation region remain the same. This includes the source size and position, mesh settings, simulation region size, monitor size and position, and boundary conditions.

In your case, I believe the ‘cross’ you observe is diffraction from your structure. By setting Bloch BC, you effectively simulate a 2D lattice of scatterers. Try replicating the same simulation conditions as for the TFSF source, starting with PML boundary conditions, and observe the results.

Best regards,
Kirill