色散周期结构的辅助场时域有限差分法分析  

Study of periodic dispersive structures using splitfield FDTD method

作　　者：鲁思龙[1] 吴先良[1,2] 任信钢[1] 梅诣偲[1] 沈晶[1,2] 黄志祥[1] 

机构地区：[1]安徽大学,计算智能与信号处理教育部重点实验室,合肥230039 [2]合肥师范学院,物理与电子工程系,合肥230061

出　　处：《物理学报》2012年第19期282-286,共5页Acta Physica Sinica

基　　金：国家自然科学基金重点项目(批准号:60931002;61101064);安徽省杰出青年基金(批准号:1108085J01);安徽省高校重点项目(批准号:KJ2011A002;KJ2011A242)资助的课题~~

摘　　要：利用辅助场时域有限差分(FDTD)方法分析色散周期结构的斜入射问题.主要基于Floquet定理,在FDTD迭代式中引入辅助场量,结合变换的周期及吸收边界条件,解决了周期结构斜入射问题的电磁特性仿真.进一步将辅助场FDTD方法引入至色散周期结构的模拟,结合Z变换方法,给出了基于Drude色散模型的具体迭代公式.数值计算结果表明所构建方法的有效性及普适应.The dispersive periodic structures are simulated by the split-field finite difference time domain （FDTD） method. According to the Floquet theorem, a set of auxiliary elements are introduced into the FDTD iteration to deal with electromagnetic simulation of oblique incidence on periodic structures, by combining the periodic and absorption boundary condition. We here extend the split-field method to the study of periodic dispersive structures by combining the Z transformation method. The iterative equations of the Drude dispersive model are also provided. By Comparing analytical and other numerical results, the efficiency and wide applicability of our method are demonstrated.

关 键 词：周期结构 辅助场 Drude模型 Z变换 

分 类 号：TN011[电子电信—物理电子学]