Take a look at:
https://meep.readthedocs.io/en/latest/Python_Tutorials/Mode_Decomposition/#diffraction-spectrum-of-liquid-crystal-polarization-gratings
On 7/1/2020 4:48, Lorenzo König wrote:
I am trying to measure the polarization conversion of a half wave plate. In
practice, I have a right-hand circularly polarized input plane wave (Ex+i*Ey)
which propagates through a subwavelength grating acting as half wave plate
(simulation is set in 3d). I would like to measure the polarization conversion,
i.e. the amount of flux that is converted to left-hand polarization (Ex-i*Ey).
Is there a way to measure the flux for a specific polarization (similar to
'add_flux')? I know I could simply output the fields and calculate the
circularly polarized components as Ex±i*Ey for visualization, but I would
appreciate a quantitative solution to measure the leakage term, i.e. the amount
of flux which is not converted to opposite helicity.
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