Si/SiO2 slab TE waveguide transmission vs Tidy3D

Si/SiO2 slab TE waveguide transmission vs Tidy3D#

validated · 2026-08-28

forwardresolution 1parityp1picwaveguidetidy3d_goldenhigh_yield

This case compares a local FDTDX result with pinned reference data generated by Tidy3D. The originating Tidy3D example is ModalSourcesMonitors.ipynb, pinned at commit c37c785d52e9.

Technical schematic associated with Si/SiO2 slab TE waveguide transmission vs Tidy3D

Integrated-photonics geometries covered by the benchmark suite.#

What is exercised#

Lossless slab should transmit ~1.0. FDTDX via calculate_sparam / mode overlap.

This case runs at its declared full benchmark resolution (resolution factor 1.0).

Recorded result#

Metric

Observed / error

Reference / limit

Error

Effective budget

Result

T_far

1.00005

1

5.319e-05

0.1

PASS

The table is rendered from progress.json; it is not a hand-written success claim. For metrics that report an error directly, the “observed” column repeats that error and the reference column is the acceptance threshold.

Reproduce#

uv run fdtdx-bench run --case parity_waveguide_TE

Implementation and provenance: benchmarks/cases/parity_waveguide_TE/case.yaml, benchmarks/cases/parity_waveguide_TE/run.py, benchmarks/goldens/parity_waveguide_TE.npz.

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