fields.stack_amplitudes_interior_with_source

Computes the wave amplitudes in the case of an internal source.

s_matrices_interior_before_source: The interior scattering matrices for the layer substrack before the source, as computed by stack_s_matrices_interior.
s_matrices_interior_after_source: The interior scattering matrices for the layer substack after the source.
backward_amplitude_before_end: The backward-going wave amplitude at the end of the layer before the source.
forward_amplitude_after_start: The forward-going wave amplitude at the start of the layer after the source.

None: The forward- and backward-propagating wave amplitude for each layer, defined at the start and end of each layer, respectively.