Quan–Lončar result

Status: provisional publication candidate

The air-clad cavity has 15 positive-side elliptical holes and 45 free parameters: 15 gaps, 15 longitudinal radii, and 15 transverse radii. The frozen candidate compares the original Quan–Lončar-style baseline with the Phase-58 three-step optimized seed.

Top-view geometry at matched axes. Silicon is blue; air apertures are white. Sources: legacy/quan_loncar/seeds/quan_baseline.json and quan_optimized_phase58.json. Generated by analysis/build_figures.py.

Historical evidence

The retained matched 24-ps analysis reports:

Endpoint	FDTD Q
Baseline	15,449.47
Phase-58 step 3	59,337.16
Ratio	3.8407×

This is the strongest historical transfer result, but it is not yet a paper value. Exact endpoint field arrays were not retained. Archived field images from other stages are therefore not shown as if they were these endpoints. The publication panel will generate new matched fields, spectra, ringdowns, and mesh/runtime/boundary convergence evidence.

Gate

Every executed matched variant must retain the same mode, pass the declared fit threshold, and have optimized Q above baseline Q. Until then, the manuscript labels the ratio historical and provisional.