Nonlinear infrared transmission through and reflection off antiferromagnetic films under magnetic field

We present the nonlinear infrared transmission through and reflection off an antiferromagnetic film under the magnetic field. In the geometry with the anisotropy axis parallel to the film surface and normal to the plane, using TE wave obliquely incident upon the film, we find that the nonlinear modification for the transmission and reflection is very obvious, especially for the large incident angle.