Abstract

We present a theory of nonlinear infrared transmission through and reflection off anantiferromagnetic film with uniaxial anisotropy. In the geometry with the anisotropy axisparallel to the film surface and normal to the plane of incidence, using a linearly polarizedwave (TE wave) obliquely incident upon the film, we obtain the transmissionand reflection spectra. For an incident intensity available in experiments, theobvious nonlinear effects are seen in the vicinity of the resonant frequency. Thenonlinear reflection and transmission can be much stronger or weaker than the linearones, depending on frequencies or incident angles. The nonlinear interaction alsodramatically increases or decreases the absorption of electromagnetic energy in thefilm.

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