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首页> 外文期刊>Optical fiber technology >Sensitivity increasing in plasmonic optical sensor with (Au-SiO_2) aperture arrays on a Bragg fiber endface
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Sensitivity increasing in plasmonic optical sensor with (Au-SiO_2) aperture arrays on a Bragg fiber endface

机译：在布拉格光纤端面上具有（AU-SiO_2）孔径阵列的等离子体光学传感器中的灵敏度

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摘要

In this paper, we theoretically demonstrate a sensitivity increasing in the plasmonic optical sensor (POS) with (Au-SiO2) aperture arrays on a core-cladding (C-C) cylindrical Bragg fiber endface based on the extraordinary optical transmission (EOT) property. Numerical investigations show that the design of C-C Bragg fiber significantly affects the sensitivity enhancement due to Fresnel reflection compared with C-C fiber by using a mode analysis approach. The essential parameters including the thickness of Au and SiO2, the refractive index (RI) as well as its width of a torus in the fiber cladding and the gap between two adjacent tori, which affect the EOT, are discussed and optimized. A high average sensitivity of 284 +/- 5 nm/RIU of the POS in the sensing range 1.30-1.42 with high linearity is achieved for the peak wavelength interrogation. It is demonstrated that a significant sensitivity increases in the proposed POS (the thickness is 100 nm, the RI is 1.5, the width is 20 nm and the gap is 50 nm) up to 219 arbitrary units (similar to 337%), which is clearly observed more than that of C-C fiber. The averaged figure of merit (FOM) of the proposed POS is calculated to be 5.2 RIU-1. Our findings hold potential applications in designing and optimizing a high-performance POS.
机译：在本文中，理论上，基于非凡的光学传输（EOT）特性，理论上，我们用（Au-SiO2）孔径阵列（Au-SiO2）孔径阵列的等离子体光学传感器（POS）的灵敏度增加。数值研究表明，通过使用模式分析方法，C-C Bragg纤维的设计显着影响了与C-C光纤相比的菲涅耳反射引起的灵敏度增强。讨论并优化了包括Au和SiO 2的厚度，折射率（Ri），折射率（Ri）以及其两个相邻漩涡之间的间隙的基本参数，以及影响EOT的两个相邻扭矩之间的间隙。对于峰值波长询问，实现了具有高线性度的感测范围1.30-1.42中的POS的高平均灵敏度。结果证明，所提出的POS（厚度为100nm，RI为1.5，宽度为20nm，间隙为50nm），显着灵敏度增加到219个任意单位（类似于337％）清楚地观察到CC光纤的多。所提出的POS的平均值（FOM）的平均值计算为5.2 RIU-1。我们的调查结果持有潜在的应用设计和优化高性能POS。

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