upload phase calculation example

[FilipeFcp]

Hi all. A user asked for an example of how to calculate phase. I had this a long time ago as part of the vortex metasurface notebook .
I didn’t include it in the notebook, but I thought it would be a good idea to make a simple example for it.

Almost all comments in the code are AI-generated

[github-actions]

Spell Check Report

PhaseChangeAntennas.ipynb:

Cell 1, Line 3: 'V-shaped'
  > This notebook reproduces the phase behavior of cross-polarized scattering from gold V-shaped antennas on a silicon substrate, as demonstrated in the following paper:
Cell 16, Line 5: 'dataScatteringCylinders'
  > results = batch.run(path_dir="dataScatteringCylinders")
Cell 20, Line 1: 'On-Axis'
  > ### Extracting On-Axis Phase Delays
Cell 26, Line 4: 'dataScatteringCylindersPeriodic'
  > results_periodic = batch_periodic.run(path_dir="dataScatteringCylindersPeriodic")

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[tomflexcompute]

Thanks @FilipeFcp . This is the prelude of the vortex beam generation notebook you created.

In this notebook you used PML on x and y and used the field monitor to extract the phase. I wonder if it's more common to use periodic boundary (local periodic approximation) and diffraction monitor? Is there a particular reason why you chose to use pml? I suspect both methods will give you very similar results.

[alec-flexcompute]

Nice job @Filipe! I have just two suggestions:

1. In cell 2, maybe specify what the "hemisphere" parameter does in the function

2. Maybe plotting one of the simulations before running so we can visualize the field and source setup

[FilipeFcp]

@tomflexcompute
Yes, using the DiffractionMonitor and PBC yields the same results (with a smaller computational domain).
Do you think I should keep both approaches for didactic reasons, or just use the DiffractionMonitor approach?

[tomflexcompute]

@tomflexcompute Yes, using the DiffractionMonitor and PBC yields the same results (with a smaller computational domain). Do you think I should keep both approaches for didactic reasons, or just use the DiffractionMonitor approach?

Yes I think showing both approaches would be great.

[FilipeFcp]

Thanks, everyone.

I’ve made the changes based on Alec’s comments and added the section using the DiffractionMonitor.

Thanks!