eh_near_cartesian

miepython.field.eh_near_cartesian(lambda0, d_sphere, m_sphere, n_env, x, y, z, include_incident=True, n_pole=0, abcd=None)[source]

Calculate electric and magnetic near fields in Cartesian coordinates.

Parameters:

lambda0 (float) – Vacuum wavelength.
d_sphere (float) – Sphere diameter.
m_sphere (complex) – Sphere refractive index.
n_env (float) – Refractive index of the surrounding medium.
x (float or ndarray) – Cartesian x coordinate(s).
y (float or ndarray) – Cartesian y coordinate(s).
z (float or ndarray) – Cartesian z coordinate(s).
include_incident (bool) – Include incident field for points outside sphere.
n_pole (int) – Number of multipole terms to keep. 0 (the default) keeps two more than Wiscombe’s criterion, which converges the near field at the sphere surface roughly five times closer than the criterion alone.
abcd (ndarray or None) – Optional precomputed coefficients [a, b, c, d].

Returns:

tuple[ndarray, ndarray] –