PoleResidue

A dispersive medium described by the pole-residue pair model. The frequency-dependence of the complex-valued permittivity is described by:

$\epsilon(\omega) = \epsilon_\infty - \sum_i\left[\frac{c_i}{j \omega + a_i} + \frac{c_i^\ast}{j \omega + a_i^\ast}\right]$

Name

name: Optional unique name for medium.

Frequency Range

frequency_range: Optional range of validity for the medium.

Type: floating-point number

• Unit: Hz
• Constraint: greater than 0
• Default: None

Epsilon at Infinity

eps_inf: Relative permittivity at infinite frequency ($\epsilon_\infty$).

Type: floating-point number

• Unit: unitless
• Constraint: greater than or equal to 1
• Default: 1

Poles

poles: List of complex-valued ($a_i, c_i$) poles for the model.

a: complex number

• Unit: rad/sec

c: complex number

• Unit: rad/sec