Voigt位型下电介质／反铁磁／电介质结构二次谐波生成非倒易性研究

摘要

We calculate the second harmonic generation (SHG) from structures with dielectric/antiferromagnetic(AF)/dielectric in Voigt geometry. The calculations are performed with a nonlinear transfer matrix method and examples of nonreciprocal SHG are given. In particular, we study the nonreciprocal SHG in four different configurations when the direction of an applied magnetic field and the order of dielectric films are reversed. The nonreciprocal SHG can be realized in a resonance zone of AF, including THz frequency range. The increasing of the angle of incidence wave can enhance the effect of nonreciprocal SHG. In terms of applications, AF may be of interest in signal processing in the THz.%利用非线性传递矩阵方法研究了Voigt位型下电介质／反铁磁／电介质结构二次谐波生成的非倒易性．研究发现外加静磁场反向和电介质层排序翻转均对二次谐波输出产生影响，出现了二次谐波生成的非倒易性．二次谐波生成非倒易性频率区域在反铁磁共振区，此区间正处于THz频段．随着入射角度的增加，非倒易性的效果越来越明显．研究二次谐波生成的非倒易性，可为反铁磁器件的设计加工提供理论支持．