The new Polarization domain feature facilitates coupling different frequency-domain interfaces together. This new feature simplifies simulations of nonlinear frequency mixing, like sum- and difference-frequency generation and nonlinear parametric processes. The
Polarization feature is available for the Electromagnetic Waves, Frequency Domain and the Electromagnetic Waves, Beam Envelopes interfaces.
In the settings for the Electromagnetic Waves, Beam Envelopes interface, there is a new section called User Defined Wave Vector Specification. This section appears when the Type of phase specification parameter is set to User defined. Normally, the values for the wave vectors should be the default settings. However, this new section allows the specification of special settings in, for instance, perfectly matched layer (PML) domains.
The Electromagnetic Waves, Time Explicit interface now include an Absorbing Layer feature that is used to set up effective nonreflecting-like boundary conditions. The layers work by combining three techniques: a scaling system, filtering, and a simple nonreflecting boundary condition.
The layers are set up by adding the Absorbing Layer feature available under the
Definitions node.
For 3D models, the Components parameter for the Diffraction Order feature now also have the option Orthogonal polarization, for the mode numbers
m =
n = 0. When you choose Orthogonal polarization, the mode gets a polarization that is orthogonal to the polarization of the incident wave.
When the Compute Diffraction Orders button in the
Port Mode Settings section for periodic ports is clicked, a mode with Orthogonal polarization for the mode numbers
m =
n = 0 will be added if that mode is not evanescent for the other specified parameters in the
Port Mode Settings section.