Summary
Can repeated metasurface optimization avoid expensive eigenvector calculations?
Implements differentiable rigorous diffraction interface theory with GPU-friendly operations.
Reports up to 16.2× faster inverse design in its comparison workloads.
Related modelling approaches
Relation labels come from the method guide and are editorial. Unlabelled links are conceptual connections or comparison methods; the paper does not necessarily implement them.
Commentary
Thickness, expansion order, material contrast and numerical stability still require checking.
A precursor to newer matrix-function and boundary-field formulations; it does not add laser gain dynamics by itself.
Interpretation and connections in this note, separate from the authors’ reported findings.