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首页> 外文期刊>Optics Letters >Boosting the figure of merit of refractive index sensing via magnetoplasmon in H-shaped magnetoplasmonic crystals
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Boosting the figure of merit of refractive index sensing via magnetoplasmon in H-shaped magnetoplasmonic crystals

机译:通过H形磁体上晶体磁性磁性抗折射率感应的折射率感测的优点

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摘要

Nanoscale refractive index (RI) sensors based on plasmonic structures usually suffer from a low figure of merit (FoM) due to the broad linewidth of the resonance peaks. Here, we report a magnetoplasmon-based RI sensing method with high FoM in the designed H-shaped magnetoplasmonic crystals. Instead of the light intensity spectrum, the Faraday signal is detected to analyze the changes of the surrounding RI. Sharp resonance with extremely narrow linewidth is obtained by plotting the reciprocal Faraday rotation near the null point region. Therefore, the FoM is hugely enhanced, and a theoretical value exceeding 1775/RIU is achieved, which is one order of magnitude higher than has ever been reported, to the best of our knowledge, for the RI sensor based on the Faraday effect. The Faraday reversal and the enhanced FoM arise from the Fano resonance. These findings are of potential value for practical high performance biochemical sensors. (C) 2020 Optical Society of America
机译:基于等离子体结构的纳米级折射率(RI)传感器通常由于共振峰的宽线宽而受到优点(FOM)的低图。 在这里,我们在设计的H形磁正相色晶体中报告了具有高FOM的基于磁化磁性的RI感测方法。 检测到法拉第信号而不是光强度光谱,以分析周围RI的变化。 通过在空点区域附近绘制倒数法拉第旋转来获得具有极窄线宽的急剧共振。 因此,FOM非常提升,实现了超过1775 / Ruu的理论值,这是基于法拉第效应的RI传感器的最佳知识的一个量大量大。 法拉第逆转和增强的FOM来自Fano共鸣。 这些发现对于实际高性能生化传感器具有潜在的价值。 (c)2020美国光学学会

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  • 来源
    《Optics Letters》 |2020年第20期|共4页
  • 作者单位

    Nanjing Univ Collaborat Innovat Ctr Adv Microstruct Jiangsu Key Lab Nanotechnol Nanjing Natl Lab Microstruct Nanjing 210093 Peoples R China;

    Nanjing Med Univ Sch Biomed Engn &

    Informat Nanjing 211166 Peoples R China;

    Nanjing Univ Collaborat Innovat Ctr Adv Microstruct Jiangsu Key Lab Nanotechnol Nanjing Natl Lab Microstruct Nanjing 210093 Peoples R China;

    Nanjing Univ Collaborat Innovat Ctr Adv Microstruct Jiangsu Key Lab Nanotechnol Nanjing Natl Lab Microstruct Nanjing 210093 Peoples R China;

    Nanjing Univ Collaborat Innovat Ctr Adv Microstruct Jiangsu Key Lab Nanotechnol Nanjing Natl Lab Microstruct Nanjing 210093 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 计量学;光学;
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