Hybrid nanowedge plasmonic waveguide for low loss propagation with ultra-deep-subwavelength mode confinement

Youqiao Ma; Gerald Farrell; Yuliya SemenovaQiang Wu

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Hybrid nanowedge plasmonic waveguide for low loss propagation with ultra-deep-subwavelength mode confinement

机译：用于超深亚波长模式约束的低损耗传播的混合纳米边缘等离子体波导

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摘要

In this Letter, a novel waveguide based on hybrid surface plasmon polaritons (HSPPs) is proposed and numerically analyzed. This waveguide consists of two dielectric nanowires placed on both sides of a nanowedge-patterned metal film, which can confine light in the ultra-deep-subwavelength region (ranging from λ~2/4000 to λ~2/400) with a long propagation length (ranging from 1200 to 3500 μm). Compared to a previous HSPPs waveguide without the nano-wedges, with the same propagation length, our proposed structure has much higher mode confinement with 1 order of magnitude smaller normalized mode area. An investigation of the effect of structural perturbations indicates that our proposed waveguide also has good tolerance of fabrication errors. The proposed waveguide could be an interesting alternative structure to realize nanolasers and optical trapping.

机译：本文提出了一种基于杂化表面等离子体极化激元（HSPPs）的新型波导，并进行了数值分析。该波导由放置在纳米边缘图案金属膜两侧的两根介电纳米线组成，可以将光限制在超深亚波长区域（范围从λ~2/4000到λ~2/400），传播长度长（范围从1200到3500μm）。与之前没有纳米楔块的HSPPs波导相比，在相同的传播长度下，我们提出的结构具有更高的模式约束，归一化模式面积小1个数量级。对结构扰动影响的研究表明，我们提出的波导也具有良好的制造误差容限。所提出的波导可能是实现纳米激光和光捕获的有趣替代结构。

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来源
《Optics Letters》 |2014年第4期|973-976|共4页
作者
Youqiao Ma; Gerald Farrell; Yuliya SemenovaQiang Wu;
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作者单位

Photonics Research Center, School of Electrical and Electronic Engineering, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland;

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正文语种英语
中图分类计量学;
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Hybrid nanowedge plasmonic waveguide for low loss propagation with ultra-deep-subwavelength mode confinement

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