Conical Refraction in Magneto-optical Crystals

The paper investigates the influence of an external magnetic field on light propagation through a magneto optical biaxial, biaxial hyperbolic and anisotropic magnetophotonic crystal. It is demonstrated that the application of a magnetic field results in splitting and reconnection of an isofrequency near the self-intersection point and thus it leads to the disappearance of conical refraction in a crystal. This effect makes it possible to control light propagation by means of a magnetic field. In addition, it is demonstrated that the diffraction divergence of a beam is suppressed in a homogeneous magneto-optical biaxial crystal.