| 光子晶体耦合波导实现光开关效应的研究 |
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| 引用本文： | 黎根,刘正东,赵顺才,郑军. 光子晶体耦合波导实现光开关效应的研究[J]. 光学与光电技术, 2011, 9(2): 68-72 |
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| 作者姓名： | 黎根 刘正东 赵顺才 郑军 |
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| 作者单位： | 1. 南昌大学近代物理研究所,江西南昌,330047;南昌大学纳米工程技术研究中心,江西南昌,330047
2. 南昌大学近代物理研究所,江西南昌,330047;南昌大学纳米工程技术研究中心,江西南昌,330047;南昌大学材料科学与工程学院,江西南昌,330031 |
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| 摘 要： | 提出了一种基于光子晶体耦合波导实现光开关效应的方法:将线缺陷引入二维光子晶体以形成两平行的邻近波导,两邻近波导及其中间的两排介质柱构成了光开关模型耦合区;利用平面波展开法计算了不同介质填充率情况下的色散特性.结果发现:减小介质填充率可以实现波导耦合长度的减小;分段调整中间介质柱的填充率和选择不同的耦合搭配长度,定向耦合...
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| 关 键 词： | 光计算 光开关 有限时域差分法 定向耦合器 光子晶体耦合波导 |
Optical Switch Effect Realized by the Coupled Photonic Crystal Waveguides |
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| LI Gen,LIU Zheng-Dong,ZHAO Shun-Cai,ZHENG Jun. Optical Switch Effect Realized by the Coupled Photonic Crystal Waveguides[J]. optics&optoelectronic technology, 2011, 9(2): 68-72 |
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| Authors: | LI Gen LIU Zheng-Dong ZHAO Shun-Cai ZHENG Jun |
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| Affiliation: | 1,2) (1 Institute of Modern Physics,Nanchang University,Nanchang 330047,China; 2 Engineering Research Center for Nanotechnology,Nanchang 330047,China; 3 School of Materials Science and Engineering,Nanchang 330047,China ) |
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| Abstract: | In this paper,we demonstrate a novel optical switching structure based on a coupled photonic crystal waveguides. The switching structure is formed by two closely spaced linear defect waveguides in a two-dimensional photonic crystal of air holes in semiconductor matrix.We investigate fill factor which affects dispersion diagram by using PWM methods.In the coupling region,we found that the input signal beam can be controlled by choosing a appropriate coupling length for exchanging singals between two output ports.The coupling efficiency is increased and the coupling length is also reduced by modifying the fill factor of the coupling region between the coupled waveguides. |
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| Keywords: | optics in computing optical switch finite difference time domain directional coupling photonic crystal coupled waveguides |
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