fmm_matrices.transverse_permittivity_vector_anisotropic

fmm_matrices.transverse_permittivity_vector_anisotropic

Compute the transverse permittivity matrix with a vector scheme.

The transverse permittivity matrix E relates the electric and electric displacement fields, such that

[-Dy, Dx]^T = E [-Ey, Ex]^T

Args:

• permittivity_xx: The xx-component of the permittivity tensor, with shape (..., nx, ny).
• permittivity_xy: The xy-component of the permittivity tensor.
• permittivity_yx: The yx-component of the permittivity tensor.
• permittivity_yy: The yy-component of the permittivity tensor.
• 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 transverse permittivity matrix.