fmm_matrices.transverse_permittivity_vector
fmm_matrices.transverse_permittivity_vector
Computes transverse permittivity matrix using a vector field methods.
The transverse permittivity matrix is E2 given in equation 51 of [2012 Liu].
Args:
- permittivity: The permittivity array, with shape
(..., nx, ny). - tx: The x-component of the tangent vector field.
- ty: The y-component of the tangent vector field.
- expansion: The field expansion to be used.
Returns:
- None: The
epsmatrix.