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sources.amplitudes_for_source

sources.amplitudes_for_source​

Computes wave amplitudes resulting from an internal source.

The configuration of the calculation is depicted below. A source is located at the interface of two layers. The layer stacks before and after the source are named as such. The function computes the amplitudes of forward-going and backward-going waves at various locations within the stack, also depicted below.

                        source _____
                                    |
     __before_______________________V___after_____________________

    |             |     |           |           |     |           |
    |   layer 0   | ... |  layer i  |   layer   | ... |  layer N  |
    | start layer |     |           |   i + 1   |     | end layer |
    |             |     |           |           |     |           |

                         -> a_i      -> a_i+1          -> a_N
            b_0 <-            b_i <-    b_i+1 <-

Args:​

  • jx: The x-oriented dipole amplitude; must be at least rank-3 with a trailing batch dimension.
  • jy: The y-oriented dipole amplitude, with shape matching jx.
  • jz: The z-oriented dipole amplitude, with shape matching jx.
  • s_matrix_before_source: The scattering matrix for the layer substack before the source, having no overlap with the after-source substack. Scattering matrix pairs returned by scattering.stack_s_matrices_interior may not be directly used.
  • s_matrix_after_source: The scattering matrix for the layer substack after the source.

Returns:​

  • None: The wave amplitudes: backward_amplitude_0_end: The backward-going wave amplitude at the end of the first layer. forward_amplitude_before_start: The forward-going wave amplitude at the start of the layer preceding the source. backward_amplitude_before_end: The backward-going wave amplitude at the end of the layer preceding the source, i.e. just before the source. forward_amplitude_after_start: The forward-going wave amplitude at the start of the layer following the source, i.e. just after the source. backward_amplitude_after_end: The backward-going wave amplitude at the end of the layer following the source. forward_amplitude_N_start: The forward-going wave amplitude at the start of the final layer.