# Radiation-aware 2.5D optimization report

## Result

- Initial pole: `1.0461658217 -0.0340697632i`
- Initial Q: **15.353289**
- Final pole: `1.0600101555 -0.0160045934i`
- Final Q: **33.115810**
- Q gain: **2.156920x**
- Accepted steps: **4 / 4**
- Final defect-energy fraction: **0.586671**
- Final protected-gap energy fraction: **0.224510**
- Final nonlinear residual: **5.015e-09**
- Maximum density in protected strip: **0.000e+00**
- Reflection error: **7.772e-16**

## Evidence level

This is a working scalar-polarization, radiation-aware 2.5D discovery
optimization.  The top and bottom half spaces are exact outgoing Fourier
channel boundary conditions; no vertical PML or phenomenological radiation
penalty is used.  Q remains a reduced-model value, not a device claim.  Use
`validate_25d.py` for independent basis refinement and export the resulting
geometry to the full-vector 3D solver before accepting a physical pole.