fdtdx.unfold_fields

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fdtdx.unfold_fields#

fdtdx.unfold_fields(field, symmetry, field_type)[source]#

Reconstruct a full-domain (3, Nx, Ny, Nz) field array from the reduced field.

Mirrors the field across each symmetric axis with the correct per-component parity and concatenates the mirror image in front of the kept half, so the symmetry plane ends up at the center of the reconstructed array.

Parameters:

  • field (jax.Array) – Reduced field, shape (3, Nx, Ny, Nz) (component axis first).

  • symmetry (tuple[int, int, int]) – Per-axis symmetry (x, y, z); see module docstring.

  • field_type (Literal["E", "H"]) – Whether field is the electric or magnetic field.

Returns:

Full-domain field; each symmetric axis is doubled in size.

Return type:

jax.Array

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