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sources.dirac_delta_source

sources.dirac_delta_source​

Returns the coefficients for a delta source at the specified location.

This function is appropriate for creating sources to be used with amplitudes_for_source.

Args:​

  • location: The location of the source, with shape (num_sources, 2) and the trailing axis giving the x and y location. By convention, the center of the unit cell is at (0, 0).
  • in_plane_wavevector: The in-plane wavevevector for the calculation, which gives the offset of the plane wave decomposition. Has shape (..., 2) with possible batch dimensions.
  • primitive_lattice_vectors: The primitive lattice vectors of the unit cell.
  • expansion: The Fourier expansion used for the calculation.

Returns:​

  • None: The coefficients, with the shape (..., expansion.num_terms, num_sources).