stratified_coefficients

deeptrack.backend.mie.stratified_coefficients(m: List[complex], a: List[float], L: int) → Tuple[ndarray, ndarray]

Calculate the Mie scattering coefficients for stratified spherical particles.

This function calculates the terms up to (and including) order L using Riccati-Bessel polynomials.

Parameters

mList[float or complex]

The relative refractive indices of the particle layers (n_particle / n_medium).

aList[float]

The radii of the particle layers (> 0).

Lint

The maximum order of the spherical harmonics to be calculated.

Returns

Tuple[np.ndarray, np.ndarray]

A tuple containing arrays of coefficients an and bn, up to (and including) order L.