| 缺陷和变周期结构光子晶体特性研究 |
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| 引用本文： | 吴耀德,李志扬.缺陷和变周期结构光子晶体特性研究[J].长江大学学报,2006(10). |
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| 作者姓名： | 吴耀德 李志扬 |
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| 作者单位： | 长江大学物理科学与技术学院 华中师范大学物理科学与技术学院 湖北荆州 华中师范大学物理科学与技术学院 湖北武汉 |
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| 摘 要： | 构建了介质柱间距变化的变周期结构以及介质柱半径线缺陷两种二维光子晶体模型,并将时域有限差分法用于其能带特性研究。数值计算结果表明,在二维正方格光子晶体结构的基础上,一定范围内逐渐增加圆介质柱之间的距离,光子晶体的禁带宽度会增大,同时禁带的中心频率偏向低频方向,而采用相邻列介质柱半径交替变化的缺陷结构,也将使光子晶体的禁带发生相应的变化。
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| 关 键 词： | 光子晶体 晶格结构 能带特性 时域有限差分法 |
Performance Investigation of Photonic Crystal with Flawed and Nonperiodic Structures |
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| WU Yao-de.Performance Investigation of Photonic Crystal with Flawed and Nonperiodic Structures[J].Journal of Yangtze University,2006(10). |
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| Authors: | WU Yao-de |
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| Abstract: | Two models of 2D photonic crystal of line defects and nonperiodic dielectric rods are established.The finite-difference-time-domain method is developed for the study of bandgap.The result shows that the width of bandgap becomes wider,and the center frequency is lower than the structure of the square lattice after the increase of rod-to-rod spacing in a stated range.The radius changed by turns has corresponding effect to the width of the bandgap and the center frequency. |
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| Keywords: | photonic crystal crystal lattice bandgap finite-difference-time-domain |
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