Magnetic effects on the reflection of electromagnetic waves at isotropic–uniaxial interfaces

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The ellipsometric properties of flat boundaries between isotropic and uniaxial materials with different magnetic permeabilities are studied for three particular orientations of the optic axis. The analysis can be applied either to synthetic anisotropic materials with magnetic properties or to nonmagnetic crystals in contact with magnetic isotropic media. By analysis of noticeable features in the curves of reflectivity versus angle of incidence, the space of constitutive parameters is divided into regions where the reflectivity exhibits very different qualitative behaviors. Some unusual reflection effects, such as the simultaneous existence of Brewster angles for p and s polarizations and the existence of angles for which the reflection matrix is null, are shown to be theoretically possible. Conditions for total reflection and total transmission are investigated and exemplified numerically by means of a parametric study.