Surface and magnetic polaritons on two-dimensional nanoslab-aligned multilayer structure.
Surface and magnetic polaritons on two-dimensional nanoslab-aligned multilayer structure.
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DOI：
10.1364/oe.19.016375
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发表时间：
2011-08
期刊：
影响因子：
3.8
通讯作者：
Zhijian Zhang;Keunhan Park;Bong Jae Lee
中科院分区：
文献类型：
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作者：
Zhijian Zhang;Keunhan Park;Bong Jae Lee
本研究从理论上研究了在金属衬底和方形截面金属光栅之间有介电间隔的二维（2-D）多层结构的辐射特性。与在不透明金属膜上涂覆在介电间隔上的一维金属条不同[Opt. Express 16,11328(2008)]，二维金属光栅除了支持沿金属-介电界面传播的表面等离子体外，还可以支持局部表面等离子体。此外，电介质间隔的存在也允许磁极化子的激发。利用二维严格耦合波分析阐明了所提出结构的表面和磁极性的潜在机制。本研究获得的结果将促进我们对纳米尺度光-物质相互作用的基本理解，并将促进工程纳米结构在现实世界中的应用，如热光伏和光伏器件的发展。
The present study theoretically investigates the radiative properties of a two-dimensional (2-D) multilayer structure that has a dielectric spacer between a metallic substrate and square cross-sectional metallic gratings. Differently from the one-dimensional metallic strips coated on a dielectric spacer atop an opaque metallic film [Opt. Express 16, 11328 (2008)], the 2-D metallic gratings can support the localized surface plasmon in addition to the propagating surface plasmon along the metal-dielectric interface. Moreover, the presence of a dielectric spacer also allows the excitation of magnetic polaritons. Underlying mechanisms of the surface and magnetic polartions on the proposed structure are elucidated by employing the 2-D rigorous coupled-wave analysis. The results obtained in this study will advance our fundamental understanding of light-matter interaction at the nanometer scale and will facilitate the development of engineered nanostructures for real-world applications, such as thermophotovoltaic and photovoltaic devices.