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[docs] document scattering conventions and frozen-basis workflows

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Update examples for sampled-interface tapers, explicit physical CPML spacing, copied SCPML widths, and the consolidated complex mode solver. Document breaking API changes, overlap measures, and PML convergence.
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Forgejo Actions 2026-10-18 23:07:53 -07:00
commit 7e407dd1ac
10 changed files with 152 additions and 29 deletions
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4
examples/fdtd.py
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@ -145,7 +145,7 @@ def main() -> None:
# PMLs in every direction
pml_params = [
[cpml_params(axis=dd, polarity=pp, dt=dt, thickness=pml_thickness, epsilon_eff=n_air ** 2)
[cpml_params(axis=dd, polarity=pp, dt=dt, dx=dx, thickness=pml_thickness, epsilon_eff=n_air ** 2)
for pp in (-1, +1)]
for dd in range(3)]
update_E, update_H = updates_with_cpml(cpml_params=pml_params, dt=dt, dxes=dxes, epsilon=epsilon, dtype=complex)
@ -203,7 +203,7 @@ def main() -> None:
dxes_fdfd = copy.deepcopy(dxes)
for pp in (-1, +1):
for dd in range(3):
stretch_with_scpml(dxes_fdfd, axis=dd, polarity=pp, omega=omega, epsilon_effective=n_air ** 2, thickness=pml_thickness)
dxes_fdfd = stretch_with_scpml(dxes_fdfd, axis=dd, polarity=pp, omega=omega, epsilon_effective=n_air ** 2, thickness=pml_thickness)
# Compare the extracted phasor to the FDFD operator on the stretched grid,
# not the unstretched Yee spacings used by the raw time-domain update.
A = e_full(omega=omega, dxes=dxes_fdfd, epsilon=epsilon)