Sum Frequency Generation Of Antiferromagnetic Film In Thz Frequency Field

The nonlinear effect of the magnetic material from the material itself is an intrinsic property.Antiferromagneticmaterial as a typical magnetic structure, the optical nonlinearity has become a hot topic in the current. The resonant frequency response of the anti-ferromagnetic material, it is located in the terahertz range in the far infrared to millimeter wave. Terahertz frequency area is an important spectral region for international communications and detection technology developed. Therefore, to study the nonlinear nature of this range anti-ferromagnetic material is of practical significance. Theory, the traditional nonlinear optical properties mainly from the nonlinear response of the electrode in the medium on the electric field of electromagnetic waves; For magnetic materials, the kinetics of nonlinear response of the magnetization of the magnetization from the medium, the electromagnetic wave magnetic field nonlinear response. Nonlinear effects are relatively weak anti-ferromagnetic material, to stimulate its nonlinear effect of high light intensity. Therefore, on the basis of the existing light sources to increase their non-linear effects on the practical application of research is very significant.In this paper, the transfer matrix method and light localization principle for the theoretical basis to study the anti-ferromagnetic sandwich structure and a one-dimensional antiferromagnetic photonic crystal optical bistability properties. The study was less interested in the results:1. Sum frequency generation of antiferromagnetic film in the Voigt geometry. We report on a way to obtain a new source in THz frequency field based on sum frequency(SF) generation of an antiferromagnetic film(AFF). The continuous SF output windows versus the infrared signal wave frequencies are shown. We found that the highest SF outputs can be induced when the frequencies of the two signal waves are both situated at the vicinity of the same resonant frequency of AFF.2. Through the study of the antiferromagnetic sandwich structure in the Voig geometry.We present a method to increase the sum-frequency(SF) outputs in the dielectric/Antiferromagnet(AF)/Ag sandwich structures for a fixed input power. The results of this study show antiferromagnetic system of physical phenomena, revealing the physical mechanism and laws of electromagnetic wave magnetic field and the atomic magnetic moments, the antiferromagnetic interaction theory to adjust the magnetic field strength of indirect control of the antiferromagnetic material performance, the theoretical basis for the anti-ferromagnetic material applied research, and provide theoretical support for the design and manufacture of THz devices.