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utils.interpolate_permittivity

utils.interpolate_permittivity​

Interpolates the permittivity with a scheme that avoids zero crossings.

The interpolation uses the scheme introduced in [2019 Christiansen], which avoids zero crossings that can occur with metals or lossy materials having a negative real component of the permittivity. https://doi.org/10.1016/j.cma.2018.08.034

Args:​

  • permittivity_solid: The permittivity of solid regions.
  • permittivity_void: The permittivity of void regions.
  • density: The density, specifying which locations are solid and which are void.

Returns:​

  • None: The interpolated permittivity.