A surface plasmon resonance (SPR) sensor based on a dual-side polished microstructured optical fiber (MOF) with a dual core is proposed for a large analyte refractive index (RI; n_a) detection range. Gold is used as a plasmonic material coated on the polished surface, and analytes can be directly contacted with the gold film. The special structure not only facilitates the fabrication of the sensor, but also can work in the n_a range of 1.42–1.46 when the background material RI is 1.45, which is beyond the reach of other traditional MOF-SPR sensors. The sensing performance of the sensor was investigated by the wavelength and amplitude interrogation methods. The detailed numerical results showed that the proposed sensor can work effectively in the n_a range of 1.35–1.47 and exhibits higher sensitivity in the n_a range of 1.42–1.43.

中文翻译：

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基于双芯双侧抛光微结构光纤的表面等离子体共振传感器。

提出了一种基于具有双芯的双面抛光微结构光纤（MOF）的表面等离子体激元共振（SPR）传感器，用于较大的分析物折射率（RI; n _a）检测范围。金用作涂覆在抛光表面上的等离激元材料，分析物可以直接与金膜接触。特殊的结构不仅有利于传感器的制造中，但还可以在工作Ñ_一个的1.42-1.46范围时的背景材料RI为1.45，超出其他传统MOF-SPR传感器的范围。通过波长和幅度询问方法研究了传感器的传感性能。详细的数值结果表明，所提出的传感器可以在n_一个范围在1.35-1.47并表现出更高的灵敏度的Ñ_一个范围的1.42-1.43。