Effective surface plasmon polaritons on the metal wire with arrays of subwavelength grooves
Effective surface plasmon polaritons on the metal wire with arrays of subwavelength grooves
复制标题
具有亚波长凹槽阵列的金属线上的有效表面等离子体激元
DOI：
10.1364/oe.14.013021
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发表时间：
2006-12-25
期刊：
影响因子：
3.8
通讯作者：
Wang, Ching-Yue
中科院分区：
文献类型：
--
作者：
Chen, Yongyao;Song, Zhenming;Wang, Ching-Yue
在本文中，我们探讨了电磁表面束缚模式的存在下，一个完美的金属线铣削阵列的亚波长槽。表面模式是轴对称的横磁（TM）波，并具有与真实的金属线上的主要传播表面等离子体激元相同的偏振态。基表面模的色散与表面等离子体激元的色散有着密切的相似性。此外，我们注意到，对于TM偏振，该金属结构可以等效于具有介电涂层的限定几何参数和有效折射率的介电涂层金属线。这种金属结构在微波或太赫兹波段的光学研究中具有潜在的应用前景。(c)2006年美国光学学会。
In this paper we explore the existence of electromagnetic surface bound modes on a perfect metal wire milled with arrays of subwavelength grooves. The surface modes are axially symmetric transverse magnetic (TM) waves and have the same polarization state with the dominant propagating surface plasmon polaritons on the real metal wires. The dispersion of the fundamental surface mode has close resemblance with the dispersion of the surface plasmon polaritons. Moreover, we note that for TM polarization this metallic structure can be equivalent to a dielectric coated metal wire with defined geometrical parameters and effective refractive index of the dielectric coating. This metallic structure is expected to have some potential applications in the optical research in microwave or THz region. (c) 2006 Optical Society of America.