Figure 2: EM.Cube's material list.
===Anisotropic Materials=== [[Image:FDTD6.png|thumb|250px|[[FDTD Module]]'s Anisotropic Material dialog]]
EM.Cube's [[FDTD Module]] allows you to define a general anisotropic material, whose constitutive parameters, i.e. permittivity ('''ε'''), permeability ('''μ'''), electrical conductivity ('''σ''') and magnetic conductivity ('''σ<sub>m</sub>'''), are all tensorial in nature. Each constitutive parameter in this case is represented by a 3×3 matrix:
* By default, the box labeled '''Uniaxial Material''' is checked. This means that all the constitutive matrices are diagonal. The off-diagonal elements of '''ε''', '''μ''', '''σ''' and ''' σ<sub>m</sub>''' matrices are all set to zero and greyed out. You need to enter values for the diagonal elements of these matrices. To set values for the off-diagonal elements of the constitutive matrices, you have to remove the "Anisotropic" check mark first.
* Click the '''OK''' button of the dialog to accept the changes and close it.
[[Image:FDTD6.png]]
Figure 1: [[FDTD Module]]'s Anisotropic Material dialog.
===Dispersive Materials===