Summary
How can twisted or incommensurate patterned layers be simulated?
Expands the plane-wave basis to represent multiple lattice periodicities.
Demonstrates calculations for twisted bilayer photonic-crystal slabs.
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
The enlarged basis can still be costly. “4D” describes the representation, not four physical spatial dimensions.
Connects familiar layered scattering to moiré geometry without assuming a small common unit cell.
Interpretation and connections in this note, separate from the authors’ reported findings.