Task · Implementation / optimization · v3-dual-input-canonical-j

Trapezoidal SWG-v0

Trapezoidal SWG 2 x 2 3-dB Coupler Implementation/Optimization

Implement and optimize a trapezoidal subwavelength-grating 2 × 2 coupler. Compare both physical input responses over 1400–1700 nm against the paper’s splitting and excess-loss envelope.

Single-task runCodex · GPT-5.6-sol

Valid

Reporting score S · baseline-normalized0.5281

Official score J · lower is better2.7873

J_baseline = 1 dimensionless · reference implementation-jbaseline-2026-09-04-v3. S = 1 means baseline parity; native evaluator gates, not S alone, determine score eligibility.

The saved final J is bound to the trusted evaluator manifest and exact Drive archive; this single-task publication does not grant task-release or official campaign authority.

Agent · model: Codex · GPT-5.6-sol
Finished: 18 Sept 2026 01:35 UTC
Wall-clock duration: 2 h 00 m 35 s
Probe budget: 30 used / 30 configured
Agent timeout: 2 h 00 m
Reasoning effort: medium
Final source digest: bf37ff842f06

The final submission cleared every trusted gate and was scored.

Individually approved single-task run, not an official campaign result or task-release certification. The final score and intermediate probes come from the retained trusted evaluator evidence. Download the verified run archive (HDF5 intentionally excluded).

Final learner design · Codex · GPT-5.6-sol

Trapezoidal SWG 2 × 2 coupler

Top view and coupling-region detail from the final design.py, verified against all 98 polygons in the scored GDS. Both physical input ports were evaluated independently.

Final learner design: two-input, two-output silicon coupler with the exact 98 GDS polygons, 19 trapezoidal coupling periods and an 80 nm gap. Top view and enlarged coupling region. — 24.18 μm long · 19 coupling periods · 220 nm silicon. Geometry illustration, not a simulated field plot.Final source bf37ff842f06

Evidence chain

Why this result is reported this way

01 · InfrastructureValid

The trusted evaluation transaction completed with a valid infrastructure boundary.

02 · Geometry checksDesign valid

Native evaluator geometry validation; this is not a foundry DRC or LVS sign-off.

03 · Final eligibilityEligible

The exact final submission cleared the trusted gate sequence.

04 · Score publicationJ and S published

Official J is authoritative; baseline-normalized S is shown only after score eligibility.

How to interpret this result

A valid outcome means the submitted artifact cleared the evaluator gates recorded for this archived run. It does not imply that every possible physical specification, fabrication condition, or later task revision has been independently re-tested.

Run trajectory · Codex · GPT-5.6-sol

Reporting score S vs. time

S is derived from each eligible raw J at its observed elapsed time. Hollow baseline markers are unscored attempts, not S = 0.

Probeindividual scoreFinalevaluationBest so farcumulative maximum