A surface plasmon resonance optical refractive index sensor (for aqueous medium) with high angular and spectral sensitivities S, very small full width at half maxima (FWHM) w (narrow resonance), and very high quality factor, χ = S/w, is proposed, which operates in both angular and spectral interrogation modes. The structure consists of a ##IMG## [http://ej.iop.org/images/0957-0233/31/7/075204/mstab803aieqn1.gif] {$Mg{F_2}$} prism and a composite plasmonic waveguide consisting of a high-index dielectic layer and a thin metal (Ag) film, separated by a low-index layer. Above the metal film, the medium is analyte. It is shown that even with a prism of low index, the proposed sensor offers very small FWHM of reflection spectra, which improves the sensor performance. Numerically, an angular sensitivity of 168°RIU −1 and a quality factor χ = 1680 ##IMG## [http://ej.iop.org/images/0957-0233/31/7/075204/mstab803aieqn2.g...] {$RI{U^{ - 1}}$}

中文翻译：

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窄共振和超高灵敏度等离激元波导折射率传感器

具有高角度和光谱灵敏度S，半峰全宽（FWHM）w（窄共振）和非常高的品质因数（χ= S / w）的表面等离子体共振光学折射率传感器（用于水性介质）为提出了在角度和光谱询问模式下工作的建议。该结构由## IMG ## [http://ej.iop.org/images/0957-0233/31/7/075204/mstab803aieqn1.gif] {$ Mg {F_2} $}棱镜和复合等离子体波导，由高折射率介电层和被低折射率层隔开的金属（Ag）薄膜组成。在金属膜上方，介质是分析物。结果表明，即使使用低折射率的棱镜，所提出的传感器也可以提供非常小的反射光谱半峰全宽，从而提高了传感器的性能。在数值上