Reply To: The role of the assume periodic option in far-field projections

[Guilin Sun]

Thank you for finding the solution!

As the website says, "assume periodic" is an approximation, since the simulation with plane wave +periodic BCs assumes infinite periodicity.  When it is approxiated to be finite number of periods for farfield projection, a window function is added. The result is similar to convolution of the simulated periodic fields and the window function.