tidy3d.Medium.epsilon

Medium.epsilon(freqs=None, component='average')

Evaluate the (complex) relative permittivity of the medium.

Parameters
  • freqs (array_like or None, optional) – (Hz) Array of frequencies at which to query the permittivity. If None, the instantaneous \(\epsilon_\infty\) is returned.

  • component (str, optional) – One of {‘average’, ‘xx’, ‘yy’, ‘zz’}, denoting which component of the permittivity to be returned.

Returns

The permittivity values, same shape as freqs.

Return type

array_like