In this paper, we propose a refractive index sensor with self-reference performance based on a two-dimensional grating structure, mainly consisting of periodic arrays of triple layer dielectric nanodisks and a continuous substrate separated by a thin gold film. Three reflection dips are observed and manipulated to realize self-reference and high sensing performance due to the excitation of magnetic dipole mode resonance, substrate mode resonance and metal layer assisted guide mode resonance. These hybrid modes have been explained by the distributions of the electric and magnetic fields in the nanostructure. A detailed analysis of the influences of material thickness on the optical properties of the proposed refractive index sensor is also investigated. Moreover, the proposed refractive index sensor demonstrates a high sensing performance, an important application for future biomedical applications, with a bulk refractive index sensitivity of 672 nm RIU −1 (RIU: refract...

中文翻译：

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基于二维金属介质光栅中混合模式共振的自参考折射率传感器

在本文中，我们提出了一种基于二维光栅结构的具有自参考性能的折射率传感器，该传感器主要由三层介电纳米盘的周期性阵列和由金薄膜分隔的连续衬底组成。由于磁偶极子模式共振，衬底模式共振和金属层辅助的引导模式共振的激发，观察和操纵了三个反射倾角，以实现自参考和高感测性能。这些混合模式已经通过纳米结构中电场和磁场的分布进行了解释。还研究了材料厚度对所提出的折射率传感器的光学性能的影响的详细分析。此外，所提出的折射率传感器具有很高的感测性能，