where μ1 and
ε1 are the material properties of the inner domain, is large; that is,
| N | >> 1.
The source electric field Es can be used to specify a source surface current on the boundary.
This section is only available for the Electromagnetic Waves, Beam Envelopes interface. Select a Propagation direction —
Normal direction (the default) or
From wave vector. The
Normal direction option assumes that the wave in the exterior material propagates essentially in the normal direction, whereas the
From wave vector option assumes that the tangential wave vector component is continuous at the boundary, as specified by the wave vectors
k1 and
k2 for the Electromagnetic Waves, Beam Envelopes interface. The normal component for the wave vector in the exterior material is obtained from the wave number, given the material parameters of the exterior domain. Thus, this option implements Snell’s law of refraction at the boundary, which makes this option useful also for dielectric exterior materials.
Select an Electric displacement field model —
Relative permittivity,
Refractive index (the default),
Loss tangent, loss angle,
Loss tangent, dissipation factor,
Dielectric loss,
Drude-Lorentz dispersion model,
Debye dispersion model, or
Sellmeier dispersion model. See the
Wave Equation, Electric node,
Electric Displacement Field section, for all settings.
Enter a Source electric field Es (SI unit: V/m). The default is 0 V/m.