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首页> 外文期刊>Optical engineering >Ultrahigh field enhanced nanofocusing of radially polarized light by conical hybrid plasmonic probe with two low-index layers
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Ultrahigh field enhanced nanofocusing of radially polarized light by conical hybrid plasmonic probe with two low-index layers

机译：用两个低指数层的锥形杂交等离子体探针增强径向偏振光的纳米焦点

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摘要

A conical hybrid plasmonic probe (CHPP) for ultrahigh field enhanced nanofocusing with lower loss is demonstrated. The CHPP consists of two different low-index dielectric layers sandwiched between a high-index conical core and a silver cladding. Properties of nanofocusing are analyzed by finite element method, under illumination of a radially polarized beam at a wavelength of 632.8 nm. The numerical results prove that, by introducing the additional lower-index layer, the whole low-index dielectric region is broadened to collect more energy efficiently, and the energy is converged on the apex of the CHPP to form the ultrahigh field enhancement. Compared with the traditional hybrid plasmonic probe, the optimized CHPP exhibits lower loss and higher field enhancement of 1771 times. The thickness and refractive index of the lower-index layer are discussed for optimizing the structure. The results indicate that the CHPP has a simple structure with excellent performance, which has important potential applications in relevant fields, particularly in nanotechnology of field enhancement. This work also provides a convenient way for designing and optimizing hybrid plasmonic structure.
机译：证明了用于较低损耗的超高压场增强纳米焦的锥形混合等离子体探针（CHPP）。 CHPP由两种不同的低射光介电层组成，夹在高折射率圆锥芯和银包覆之间。通过有限元法分析纳米焦的性质，在波长为632.8nm的径向偏振梁的照明下分析。数值结果证明，通过引入额外的下折射率层，整个低折射率电介质区域被扩大以有效地收集更多能量，并且能量会融合在CHPP的顶点上，以形成超高的场增强。与传统的杂交等离子体探头相比，优化的CHPP表现出较低的损失和更高的现场增强1771次。讨论了下折射率层的厚度和折射率以优化结构。结果表明，CHPP具有具有优异性能的简单结构，其具有相关领域的重要潜在应用，特别是在田间增强的纳米技术方面。这项工作还提供了一种设计和优化混合等离子体结构的便捷方式。

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  • 来源
    《Optical engineering》 |2019年第7期|077101.1-077101.5|共5页
  • 作者

    Kang Li Ji Xu; Sicheng Zhang; Xinyi Lu; Ning Liu; Yunqing Lu; Zhongcheng Liang;

  • 作者单位

    Nanjing University of Posts and Telecommunications College of Electronic and Optical Engineering and College of Microelectronics Nanjing China;

    Nanjing University of Posts and Telecommunications College of Electronic and Optical Engineering and College of Microelectronics Nanjing China;

    Nanjing University of Posts and Telecommunications College of Electronic and Optical Engineering and College of Microelectronics Nanjing China;

    Nanjing University of Posts and Telecommunications College of Electronic and Optical Engineering and College of Microelectronics Nanjing China;

    Nanjing University of Posts and Telecommunications College of Electronic and Optical Engineering and College of Microelectronics Nanjing China;

    Nanjing University of Posts and Telecommunications College of Electronic and Optical Engineering and College of Microelectronics Nanjing China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    conical hybrid plasmonic probe; nanofocusing; field enhancement; radially polarized light;

    机译：锥形杂交等离子体探针;纳米焦;现场增强;径向偏振光;

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