| 基于时域有限差分法平面光波的一维吸收边界条件 |
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| 引用本文： | 李凤,高益庆,朱泉水.基于时域有限差分法平面光波的一维吸收边界条件[J].南昌航空工业学院学报,2010,24(1):8-14,20. |
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| 作者姓名： | 李凤 高益庆 朱泉水 |
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| 作者单位： | 南昌航空大学; |
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| 基金项目： | 南昌航空大学科研基金项目“空间坐标调制达曼光栅的最优化设计方法研究”(EC200908228) |
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| 摘 要： | 吸收边界条件的选取在使用时域有限差分法分析设计衍射光学元件的过程中有着举足轻重的作用。文章从麦克斯韦方程组出发,推导出了一维吸收边界条件的解析解及该吸收边界对TEM波的反射系数,用数值模拟验证了在激励源分别处于讨论区域右边、中间,且在TEM波传播的同时一直存在的情况下,一维Mur一阶吸收边界条件和波延迟法的优质吸收效果。对两种边界条件的计算误差进行了对比和分析,结果表明Neum ann边界条件波形稳定早,数值精度高,Mur一阶边界条件波形稳定稍迟,有一定误差,但吸收效果很好。
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| 关 键 词： | 时域有限差分 吸收边界 TEM波 激励源 |
One-dimensional Absorbing Boundary Condition of TEM Wave Based on Finite-Difference Time-Domain Method |
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| LI Feng,GAO Yi-qing,ZHU Quan-shui.One-dimensional Absorbing Boundary Condition of TEM Wave Based on Finite-Difference Time-Domain Method[J].Journal of Nanchang Institute of Aeronautical Technology(Natural Science Edition),2010,24(1):8-14,20. |
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| Authors: | LI Feng GAO Yi-qing ZHU Quan-shui |
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| Institution: | Nanchang Hangkong University/a>;Nanchang/a>;Jiangxi 330063/a>;China |
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| Abstract: | Choosing appropriate absorbing boundary holds the balance in analyzing the effects of optical elements on travelling light-wave based on Finite-Difference Time-Domain Method.Beginning from the Maxwell equations,analytical solution of one-dimensional absorbing boundary condition and its reflection coefficients are deduced in this article,perfect absorbing effect of first order Mur absorbing boundary and travelling-wave time-delay method are proved through computational simulation on the condition that the ex... |
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| Keywords: | finite-difference time-domain absorbing boundary TEM wave excitation source |
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