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

m: list[complex]

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

a: list[float]

The radii of the particle layers (> 0).

L: int

The maximum order of the spherical harmonics to be calculated. If 0, two empty arrays are returned.

Returns

tuple[np.ndarray, np.ndarray]

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