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采用等离子体的分段线性电流密度卷积时域有限差分算法研究了横磁波入射时具有单一线缺陷的二维非磁化等离子体光子晶体的缺陷模特性.从频域角度分析得到微分高斯脉冲的透射系数,并讨论该光子晶体的晶格常数、介质圆柱半径、周期常数、缺陷层参数和等离子体参数对缺陷模特性的影响.结果表明,改变周期常数、缺陷层位置和等离子体碰撞频率不会改变缺陷模的频率,改变缺陷层介质圆柱的相对介电常数、半径和缺陷层到介质层的中心距离可以在不改变禁带宽度的前提下实现对缺陷模的调节,改变晶格常数、介质圆柱半径和等离子体频率能同时实现对禁带宽度和缺陷模的调节.
The defect mode characteristics of two-dimensional non-magnetized plasma photonic crystals with a single line defect at the time of transverse magnetic flux incident were studied by using the piecewise linear current density convolution time domain finite difference method of plasma. The differential Gaussian pulse And the influence of the lattice constant, the radius of the dielectric cylinder, the periodic constants, the parameters of the defect layer and the plasma parameters on the defect modes were discussed.The results show that the change of the periodic constant, the position of the defect layer and the plasma collision frequency are not Will change the frequency of the defect mode to change the relative permittivity of the dielectric layer of the defect layer dielectric layer, the radius and the distance from the defect layer to the center of the dielectric layer can be adjusted without changing the forbidden band width to change the lattice constant, The dielectric cylinder radius and plasma frequency enable simultaneous adjustment of the forbidden band width and the defect mode.