In this paper, a one-dimensional asymmetric layered structure combining general-function photonic crystals and nonlinear plasmas is proposed. The novel structure is theoretically investigated using the conventional transfer matrix method. Using these two special nonlinear materials, the optical nonreciprocity of the bistable absorption caused by forward and backward propagation is comprehensively studied. It is found that due to the asymmetry of the spatial distribution and the nonlinear properties of the nonlinear materials, the absorption, reflection, and transmission of light in two different directions, forward and backward, have apparent optical nonreciprocity. It is notable that when the light is traveling in the forward direction, the position of the working interval of the bistable absorption is significantly higher than that of the backward direction, and that the magnitudes of the absorptances corresponding to the forward and backward directions are also evidently different. Meanwhile, the sensitivity properties of the incident frequency and the angle under this optical nonreciprocity are further analyzed, and the reason for this extraordinary nonreciprocity phenomenon is explicated by the electric and magnetic field distributions of the proposed structure.

本文提出了一种结合通用函数光子晶体和非线性等离子体的一维非对称层状结构。使用传统的传递矩阵方法对新结构进行了理论上的研究。利用这两种特殊的非线性材料，综合研究了由前向和后向传播引起的双稳态吸收的光学非互易性。发现由于空间分布的不对称性和非线性材料的非线性特性，光在向前和向后两个不同方向的吸收、反射和透射具有明显的光学非互易性。值得注意的是，当光线向前传播时，双稳态吸收工作区间的位置明显高于后向，并且前向和后向对应的吸收率大小也明显不同。同时，进一步分析了这种光学非互易性下入射频率和角度的灵敏度特性，并通过所提出结构的电场和磁场分布来解释这种非互易性现象的原因。