| 光子晶体平面波导与脊波导高效耦合技术的研究 |
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| 引用本文： | 柏宁丰,刘旭,肖金标,张明德,孙小菡.光子晶体平面波导与脊波导高效耦合技术的研究[J].物理学报,2005,54(10):4933-4937. |
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| 作者姓名： | 柏宁丰 刘旭 肖金标 张明德 孙小菡 |
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| 作者单位： | 东南大学电子工程系,南京 210096 |
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| 摘 要： | 利用一维变周期谐振腔阵列和非线性缓变边界，可以实现光波从脊波导到光子晶体平面波导 （PCW）的高效耦合.基于平面波展开法（PWE）和时域有限差分法（FDTD），深入分析和讨 论了普通脊波导、2D-PCW结构和本征模以及工作模式、缓变边界形状等对耦合效率的影响， 从而得出光波从脊波导到2D-PCW、再返回脊波导的统一图景.指出考虑模式转换和采用缓变 边界条件可以极大提高PCW与脊波导间的耦合效率.对PC-PW边界采用线性和非线性缓变结构 进行了仿真，讨论了边界缓变程度对耦合效率的影响.结果表明，采用模式耦合和PC-PW余弦 缓变边界时的耦合效率在较宽的带宽内超过了95%.
关键词：
光子晶体波导
脊波导
PWE
FDTD
耦合边界
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| 关 键 词： | 光子晶体波导 脊波导 PWE FDTD 耦合边界 |
| 文章编号： | 1000-3290/2005/54（10）/4933-05 |
| 收稿时间： | 2/2/2005 12:00:00 AM |
| 修稿时间： | 2005-02-022005-03-22 |
Efficient coupling from dielectric rib waveguide to two-dimensional photonic crystal waveguide |
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| Bai Ning-Feng,Liu Xu,Xiao Jin-Biao,Zhang Ming-De,Sun Xiao-Han.Efficient coupling from dielectric rib waveguide to two-dimensional photonic crystal waveguide[J].Acta Physica Sinica,2005,54(10):4933-4937. |
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| Authors: | Bai Ning-Feng Liu Xu Xiao Jin-Biao Zhang Ming-De Sun Xiao-Han |
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| Institution: | Laboratory of Photonics and Optical Communications Department of Electronic Engineering, Southeast University, Naajing 210096, China |
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| Abstract: | An efficient adiabatic coupling is presented in this paper for coupling light between rib dielectric waveguide and 2D photonic crystal waveguide (PCW). Using planar wave expand (PWE) method and FDTD method, the linear and nonlinear taper profiles are compared. Following with these, some widths of the entrance of the taper are compared and the best width is given. Simulation result have proved that transmission ratio above 95% can be obtained in a wider frequency range by usin g a cosine taper profile than line taper profile. |
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| Keywords: | photonic crystal dielectric rib waveguide planar wave expand FDTD coupling b oundary |
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