| Enlargement of Photonic Band Gaps and Physical Picture of Photonic Band Structures |
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| 引用本文： | 张艳 史俊杰. Enlargement of Photonic Band Gaps and Physical Picture of Photonic Band Structures[J]. 中国物理快报, 2006, 23(3): 639-642 |
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| 作者姓名： | 张艳 史俊杰 |
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| 作者单位： | State Key Laboratory for Mesoscopic Physics, and School of Physics, Peking University, Beijing 100871 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant Nos 60276004 and 60390073. |
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| 摘 要： | Light propagation in a one-dimensional photonic crystal （PC）, consisting of alternative slabs with refractive indices （layer thicknesses） nl （a） and n2 （b）, is investigated. An important optimal parameter matching condition, n1a ≈ n2b, is obtained for the largest photonic band gap （PBG）. Moreover, we find that the exact analytical solutions for the electric/magnetic field eigenmodes at the band edges are standing waves with odd or even symmetry about the centre of each layer. The electric/magnetic field eigenfunctions at the top and bottom of the nth band have n and n - 1 nodes in one period of PC, respectively. The PBG arises from the symmetric differences of the field eigenfunctions at the band edges.
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| 关 键 词： | 光子带隙 物理图 光子带结构 光传播 光子晶体 |
| 收稿时间： | 2005-12-01 |
| 修稿时间： | 2005-12-01 |
Enlargement of Photonic Band Gaps and Physical Picture of Photonic Band Structures |
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| ZHANG Yan, SHI Jun-Jie. Enlargement of Photonic Band Gaps and Physical Picture of Photonic Band Structures[J]. Chinese Physics Letters, 2006, 23(3): 639-642 |
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| Authors: | ZHANG Yan SHI Jun-Jie |
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