Function mie_cyl 

pub fn mie_cyl(
    kz: f64,
    order: i32,
    k0: f64,
    radii: &[f64],
    materials: &[Material],
) -> Result<MieCylResidual>

Mie coefficients of concentric chiral cylinders at the axial wavenumber kz and the azimuthal order m (order).

radii are the boundary radii, from inner to outer, and materials has one more entry, the embedding medium last.

Upstream: treams.coeffs.mie_cyl.