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Sensitivity enhancement of surface plasmon resonance based fiber optic refractive index sensor using an additional layer of zinc oxide

机译:使用附加的氧化锌层提高基于表面等离子体共振的光纤折射率传感器的灵敏度

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We have experimentally demonstrated the role of the high index dielectric layer of zinc oxide over the metal layer on the performance of the surface plasmon resonance based fiber optic refractive index sensor. The configuration contains copper as a SPR active metallic layer covered by dielectric layer. The configuration of Cu/ZnO shows high sensitivity. Further increase in the thickness of ZnO layer increases the sensitivity of the sensor. A good agreement between experimental results and the simulated ones based on multilayer two dimensional approach is obtained. The additional advantages of ZnO layer, apart from sensitivity enhancement, are protection of metallic layer from oxidation, tunability of the resonance wavelength region, biocompatibility and capability of gas sensing.
机译:我们已经通过实验证明了金属层上方的氧化锌高折射率电介质层对基于表面等离振子共振的光纤折射率传感器的性能的作用。该配置包含铜作为被电介质层覆盖的SPR活性金属层。 Cu / ZnO的配置显示出高灵敏度。 ZnO层厚度的进一步增加会增加传感器的灵敏度。基于多层二维方法,实验结果与模拟结果吻合良好。 ZnO层的其他优点,除了提高灵敏度外,还可以保护金属层免于氧化,谐振波长区域的可调性,生物相容性和气体感应能力。

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