Lorentz

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

$\epsilon(f) = \epsilon_\infty + \sum_i\frac{\Delta\epsilon_i f_i^2}{f_i^2 - 2jf\delta_i - f^2}$

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

Coefficients

coeffs: List of ($\Delta\epsilon_i, f_i, \delta_i$) values for model.

Required field

$\Delta\epsilon$: floating-point number

• Unit: unitless

$f$: floating-point number

• Unit: Hz

$\delta$: floating-point number

• Unit: Hz