Sarah Osamah, Makram A Fakhri, Ali Abdulkhaleq Alwahib, Evan T Salim, Raed Khalid Ibrahim, Al-B F A Mohammed, Subash C B Gopinath, Motahher A Qaeed, Hanan I Ibrahim, Akram Sh Ahmed, Hussein A Shakir, Ban K Hadi
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引用次数: 0
摘要
表面等离子体共振（SPR）是金属与介电材料相互作用时产生的一种电磁现象。过去几十年来，光纤传感器因其极其灵敏的性能而备受关注。我们从理论上研究了一种基于双对称光栅 D 形光纤（Dual SGD-SF）的新型等离子体传感器设计。研究了光栅深度和金银厚度的影响。对于分析物 RI = 1.5 和光栅深度 = 0.3 μm 的双 SGD-SF 传感器设计，最大损耗时的共振波长为 2.4 μm。双 SGD-SF 的最大波长灵敏度、分辨率和 FOM 分别为 2000 nm/RIU、0.00005 RIU 和 22.22 RIU-1。这种设计是为传感极低浓度的分析物而提出的，有助于发现与高纯度液体相比折射率的变化。据我们所知，使用对称光栅设计作为折射率传感器以前还没有报道过。
A novel design of symmetrical grating built on D-shaped optical fiber sensor-based surface plasmon resonance
Surface Plasmon Resonance (SPR) is an electromagnetic phenomenon that occurs during the interaction between metals and dielectric materials. Fiber sensors show much attention in the last few decades because of their extremely sensitive performance. A novel design of a Dual symmetrical grating D-shaped fiber (Dual SGD-SF) based plasmonic sensor was theoretically studied. The effects of grating depth and gold and silver thickness were investigated. For the Dual SGD-SF sensor design at analyte RI = 1.5 and grating depth = 0.3 μm, the resonance wavelength at the maximum loss was 2.4 μm. The maximum wavelength sensitivity, resolution, and FOM for Dual SGD-SF were obtained at 2000 nm/RIU, 0.00005 RIU, and 22.22 RIU−1, respectively. This design was proposed for sensing very low concentrations of analyte and helps to discover the variations of refractive indices compared to high-purity liquids. To the best of our knowledge, using a symmetrical grating design as a refractive index sensor has not previously been reported.
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