Sellmeier

A dispersive medium described by the Sellmeier model. The frequency-dependence of the refractive index is described by:

$n(\lambda)^2 = 1 + \sum_i \frac{B_i \lambda^2}{\lambda^2 - C_i}$

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

Coefficients

coeffs: List of Sellmeier ($B_i, C_i$) coefficients.

Required field

$B$: floating-point number

• Unit: unitless

$C$: floating-point number

• Unit: μm$^2$
• Constraint: greater than or equal to 0