Reply To: How to find the polarization of the electric field at the far-field?

[Guilin Sun]

This is a more theoretical question than simulation.

If such beam can be quantified in one plane, it might be on the focal plane. when light propagates along z, it is xy plane, then you can plot the vectorial field using visualizer:

 

those are just for visualizetion. if you can quantify the fields in math it would be better.

 

On the other hand, if it can only be quantified along the propagation direction, you can use a ling monitor along z and plot the vectorial fields.

Please note that, Matlab uses equi-spacing data whereas FDTD is graded mesh, non-uniform data. Before save it to matlab data please interpolate the data:

interp - Script command