Design23 result

Status: provisional publication candidate

Design23 uses a SiO₂/Si₃N₄/anthracene/PVA stack, 42 positive-side elliptical holes, and 126 free hole parameters. Its historical primary candidate is one pure-BFGS trajectory from exact step 0 to exact step 105.

Matched-axis top view reconstructed from the two retained 128-entry geometry vectors. Si₃N₄ is blue and apertures are white.

Analytical Q and sparse independent FDTD checkpoints versus accepted step. The y axis is logarithmic. Open red points fail the retained resonance-error gate; blue squares denote 64-ps analyses. Sources and plotting choices are in results/figure-manifest.json.

Exact lineage

Endpoint	Runtime	Resolution	FDTD Q
Pure-BFGS step 0	12 ps	14 steps/λ	18,991.94
Pure-BFGS step 105	64 ps	14 steps/λ	58,240.27
Historical ratio	—	—	3.067×

The differing runtimes are enough to make this an audit comparison rather than a matched paper result. The value 20,942.06 belongs to a different qualified seed and is never substituted for this trajectory's initial endpoint.

Retained fields

Tidy3D XY-midplane \(|E|^2\) at 792.35 nm (step 0) and 770.50 nm (step 105), with geometry overlay. Each panel uses its own native normalization and color bar, so peak colors are not a cross-panel amplitude comparison. These legacy fields will be replaced by matched publication reruns.