Module periodic_to_cw 

Outgoing cylindrical expansion of z-periodic spherical arrays, including displaced positions.

Upstream: treams.sw.periodic_to_cw and the treams.ExpandLattice operator from a spherical to a cylindrical basis.

Structs

PeriodicToCwGradient

Position, medium, per-output-mode axial wavenumber, and period cotangents.

PeriodicToCwResidual

What periodic_to_cw_matrix saves for its pullback: the bases, the wavenumbers, the period and the polarization convention.

Functions

periodic_entry 🔒

One outgoing periodic coefficient with its displacement, medium and axial wavenumber derivatives.

periodic_to_cw

Direct outgoing spherical-to-cylindrical coefficient of a z-periodic array.

periodic_to_cw_matrix

Outgoing cylindrical expansion of a z-periodic spherical source array. Axial Fourier wavenumbers are independent inputs; compose kz=kpar+2pin/period for diffraction orders.