金属椭圆的表面等离子体波导传输特性研究

J4 ›› 2018, Vol. 35 ›› Issue (2): 252-256.

• 纤维与波导光学 • 上一篇

金属椭圆的表面等离子体波导传输特性研究

吴博雯¹,黄志祥¹,王丽华¹,吴先良²

安徽大学电子信息工程学院，安徽合肥 230601

收稿日期:2017-01-18 修回日期:2017-04-18 出版日期:2018-03-28 发布日期:2018-03-30
通讯作者: 黄志祥（1979-），安徽合肥人，博士，教授，主要从事电磁高性能计算，新型电磁材料和新型天线设计方面的研究。 Email: zxhuang@ahu.edu.cn（通信联系人）
基金资助:
Supported by National Nature Science Foundation of China（国家自然科学基金，51277001，61471001)）， Program for New Century Excellent Talents in University（教育部新世纪优秀人才基金，NCET-12-0596）, Special Subject of Scientific Research Institution（校科研机构专项资助，2015JG01）

Propagation characteristics of surface plasmonic waveguide with metalic elliptical

WU Bowen，HUANG Zhixiang，WANG Lihua，WU Xianliang

School of Electronic and Information Engineering, Anhui University, Hefei 230601, China

Received:2017-01-18 Revised:2017-04-18 Published:2018-03-28 Online:2018-03-30

摘要/Abstract

摘要： 设计了一种高折射率基底的椭圆表面等离子体波导，基于有限元法对此波导支持的基模的能流密度分布、有效折射率、传播长度、有效面积与几何参数、结构之间的依赖关系进行了分析。能流密度分布表明，能量主要集中分布在两个金属椭圆柱之间的中心区域，在金属与锗基底、基底与基底之间也存在能量。通过调节两个椭圆的中心距离及其两个半轴的大小，可以实现此波导模式传输特性的分析。工作波长确定时有效折射率随中心距的增大而减小，而传播长度增大。

关键词: 纤维与波导光学；金属椭圆；表面等离子体波导；有效折射率；传播长度

Abstract: An elliptical surface plasmonic waveguide with a high refractive index substrate is designed. Dependences of energy flux density distribution, effective refractive index, propagation length, effective area of the fundamental mode supported by the waveguide on the geometrical parameters and structure are analyzed based on the finite element method. The energy density distribution show that the energy is mainly distributed in the central region between two metallic elliptical cylinders, and there is also energy between the metal and germanium substrate，the substrate and substrate. Propagation characteristics of the waveguide mode can be analyzed by adjusting the centric distance of two ellipses and size of two semiaxis. With constant working wavelength, the effective refractive index decreases with increasing of center distance, while the propagation length increases.

Key words: fiber and waveguide optics; metalic elliptical; surface plasmonic waveguides; effective refractive index; propagation length

中图分类号:

TN252

吴博雯黄志祥王丽华吴先良. 金属椭圆的表面等离子体波导传输特性研究[J]. J4, 2018, 35(2): 252-256.

WU Bowen，HUANG Zhixiang，WANG Lihua，WU Xianliang . Propagation characteristics of surface plasmonic waveguide with metalic elliptical[J]. J4, 2018, 35(2): 252-256.

参考文献

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金属椭圆的表面等离子体波导传输特性研究

Propagation characteristics of surface plasmonic waveguide with metalic elliptical

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