Live 12-front curved-mirror beta inverse design#
Live campaign
Service not active · phase running_bounded_beta · checkpoint age 0.4 min. This page is regenerated and republished every minute.
This campaign inserts four fronts between the published 8- and 16-front devices, rasterizes the resulting 12-front-per-side geometry, and uses that literal binary mask as the warm start. After 795 LDOS updates, the objective was switched at the exact displayed checkpoint to β: the fraction of outward power in the two symmetry-related terminal waveguide modes. The trainable object remains a 2D pixel grid extruded through a 200 nm silicon slab in SiO2; no arbitrary 3D voxels are used. The central 1 µm vacuum gap and terminal PML-crossing guides are immutable.
Current metrics#
Quantity |
Current value |
|---|---|
Total accepted updates |
1089 |
Beta-phase updates |
294 |
β, both symmetric guides |
0.531 |
β, one guide |
0.266 |
Atom-frequency LDOS / vacuum (diagnostic only) |
1.02 |
Guided/x-radiation/y-radiation/z-radiation |
0.531 / 0.154 / 0.105 / 0.21 |
Guided-power normalization excess |
0 |
Conservative fitted Q |
46 |
Pole wavelength |
1.34945 µm |
Fit residual |
0.0748 |
Grid |
33.33 nm |
Fabrication state |
exact binary, single extruded etch mask |
Warm start and current design#
Optimization history#
The current differentiated score is log(β) with only a mode/flux normalization-consistency penalty. There is no LDOS or emission guard rail: the optimizer may suppress total emission if doing so increases the guided fraction. β is constructed from one common outer surface as guided power divided by guided + residual x radiation + y radiation + z radiation, so it is bounded to [0, 1]. The port-mode calibration is compared against the complete outward x channel every iteration; an excess is reported explicitly instead of permitting an unphysical β above 100%.
The preceding LDOS phase used matched-vacuum dipole source work. Its independent two-picosecond spectrum and pole fit remain below as frozen diagnostics, not as part of the beta objective.
Electric field#
Independent pole audit#
Three Cartesian mirror planes reduce the differentiated 3D solve by 8×. The dashboard mirrors the stored octant magnitude only for visualization. A single +x port solve represents both physical guides; consequently total β is twice the per-guide value.