Constant Material Model

Overview

The ConstMaterial class represents a simple, non-dispersive material with a constant complex relative permittivity. This model is useful for electromagnetic simulations, when a simple, non-dispersive description of the material properties is required.

This class can be used to assign material properties to simulation domains such as waveguides, substrates, or claddings where permittivity does not change with frequency.

Examples

Instantiating a Constant Material Object:

from pyOptiShared.Material import ConstMaterial

material = ConstMaterial("my_material", epsReal=3.45, epsImag=0.001)

wavelength = [1510, 1520, 1550]
print(material.eps(wavelength))
print(np.square(material.index(wavelength)))

Usage Notes

  • This material assumes isotropic conditions.

  • For narrowband analysis, loss can be supported via a complex term in the constant model. However, an analytic dispersive model is recommended to prevent violating Krammers-Kronig relations.

  • For more complex materials (e.g., lossy and dispersive), consider using an alternative model like Sellmeier Material Model or Experimental Material Model.