| 零折射率手征包层光纤中导模的奇异特性 |
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| 引用本文： | 董建峰,李杰,杨方清.零折射率手征包层光纤中导模的奇异特性[J].光子学报,2014,40(2):237-241. |
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| 作者姓名： | 董建峰 李杰 杨方清 |
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| 作者单位： | （宁波大学 光纤通信与网络技术研究所,浙江 宁波 315211） |
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| 基金项目： | 国家自然科学基金（No.61078060）、浙江省自然科学基金(No.Y1091139)、宁波市科技局工业攻关(No.2008B10042)、宁波市新型光电功能材料及器件创新团队(No.2009B21007)和宁波大学王宽诚幸福基金资助 |
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| 摘 要： | 对零折射率手征介质（介电常量和磁导率同时等于零的手征介质）作为包层的光纤中模式的奇异特性进行了理论研究.给出了导模的电磁场分布公式,推导出导模色散方程和功率的数学表达式,通过数值计算,给出了不同手征参量情形下的色散曲线,讨论了手征参量对归一化功率的影响,发现了导模的一些奇异特性,如存在表面波模、基模单模区,出现传播常量双值、模式交叉、功率储存现象等,特别是出现了纤芯和包层中的功率都为负值的完全后向波奇异模式.
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| 关 键 词： | 零折射率手征介质 光纤 色散方程 导模 功率 |
| 收稿时间： | 2010-07-21 |
Novel Feature of Guided Modes in the Chiral Nihility Cladding Fiber |
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| DONG Jian-feng,LI Jie,YANG Fang-qing.Novel Feature of Guided Modes in the Chiral Nihility Cladding Fiber[J].Acta Photonica Sinica,2014,40(2):237-241. |
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| Authors: | DONG Jian-feng LI Jie YANG Fang-qing |
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| Institution: | (Institute of Optical Fiber Communication and Network Technology,Ningbo University,Ningbo,Zhejiang 315211,China) |
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| Abstract: | Novel feature of guided modes in the chiral nihility (the permittivity and permeability are simultaneously zero) cladding fiber were investigated theoretically.The electromagnetic fields in the chiral nihility cladding fiber were presented.Dispersion equations and power of guided modes were derived.Dispersion curves of guided modes were plotted for different chirality parameters.The effect of chirality parameter on power was discussed.Some novel feature are found:surface wave mode and single-mode operation region,double propagation constant,mode intersection and energy store,especially,exotic backward wave mode of which the power is negative both in the core and cladding. |
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| Keywords: | Chiral nihility Fiber Dispersion equation Guided mode Power |
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