| 二维光子晶体绝对带隙的研究 |
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| 引用本文： | 汪静丽,陈鹤鸣.二维光子晶体绝对带隙的研究[J].南京邮电大学学报(自然科学版),2006,26(5):33-35,55. |
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| 作者姓名： | 汪静丽 陈鹤鸣 |
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| 作者单位： | 南京邮电大学,光电工程学院,江苏,南京,210003 |
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| 基金项目： | 江苏省高技术研究发展计划项目 |
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| 摘 要： | 晶体中获得大的绝对带隙，可以通过降低格子对称性解除简并来实现。格子对称性的降低一般可以通过向晶体的原胞内引入不同半径的柱子的方法实现，在该方法基础上结合滑移操作，对二维正方形光子晶体结构进行了研究，发现这种联合方法用于打开绝对带隙特别有用，其相对带隙宽度约为“双柱子正方形格子”情况的2倍，同时还使绝对带隙出现的位置向低频处移动。
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| 关 键 词： | 二维光子晶体 绝对带隙 对称性 |
| 文章编号： | 1673-5439（2006）05-0033-03 |
| 收稿时间： | 2005-12-31 |
| 修稿时间： | 2005-12-312006-03-03 |
The Study of Complete Photonic Band Gap in Two-Dimensional Photonic Crystals |
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| WANG Jing-li,CHEN He-ming.The Study of Complete Photonic Band Gap in Two-Dimensional Photonic Crystals[J].Journal of Nanjing University of Posts and Telecommunications,2006,26(5):33-35,55. |
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| Authors: | WANG Jing-li CHEN He-ming |
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| Institution: | College of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China |
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| Abstract: | The size of absolute band gaps in two-dimensional photonic crystals is often limited by band degeneracies at the lattice symmetry points. By reducing the lattice symmetry, these degeneracies can be lifted to increase the size of existing PBG. Symmetry reduction by the addition of different diameter rods into the unit cell of two-dimensional square lattices is explored. In this paper we consider a new structure which overlay of the glide-symmetry lattice structure with the single-rod square lattice. The result show that the size of PBG in this structure is almost 2 times as large as double-rod square lattice, and the position of complete PBG moves towards the lower frequency. |
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| Keywords: | Two-dimensional photonic crystals Complete photonic band gap Symmetry |
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