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首页> 外文期刊>IEEE sensors journal >Simulation of Multilayered Heterojunction-Based Chalcogenide Fiber SPR Sensor With Ultrahigh Figure of Merit in Near Infrared
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Simulation of Multilayered Heterojunction-Based Chalcogenide Fiber SPR Sensor With Ultrahigh Figure of Merit in Near Infrared

机译：具有超高品质因数的多层异质结硫族化物光纤SPR传感器的近红外仿真

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摘要

The dynamic nature of radiation damping in plasmonic structures can have immense potential in relation to significant improvement in plasmonic sensor performance. In this paper, we have explored the careful tuning of dynamic radiation damping in Si-Ag-graphene-Al2O3 heterojunction-based fiber optic plasmonic sensor structure. Low-refractive index rare-earth doped chalcogenide glass is considered as fiber material in near infrared spectral region. The simultaneous tuning of Ag and Al2O3 layer thicknesses with wavelength in appropriate broad ranges is investigated to enhance the sensor's performance as much as possible. As another interesting step, the presence/absence of graphene layer on sensor's performance is also examined. The results indicate that significantly large figure of merit (FOM) of magnitude 19212.67 RIU-1 at lambda = 969 nm for 5.2-nm-thick Al2O3 layer, and 36.6-nm-thick Ag layer is achievable from the proposed sensor with graphene. The above FOM is substantially larger than the existing (reported) plasmonic sensors claiming large FOM values. The findings of this paper can be crucial for developing surface plasmon reasonance biosensors with highly enhanced performance.
机译：与等离子体传感器性能的显着改善有关，等离子体结构中辐射衰减的动态性质具有巨大潜力。在本文中，我们探索了在基于异质结的Si-Ag-石墨烯-Al2O3光纤等离子体传感器结构中对动态辐射阻尼的仔细调整。低折射率稀土掺杂硫族化物玻璃被认为是近红外光谱范围内的纤维材料。研究了在适当的宽范围内同时调整Ag和Al2O3层厚度的方法，以尽可能提高传感器的性能。作为另一个有趣的步骤，还检查了石墨烯层对传感器性能的影响。结果表明，对于5.2 nm厚的Al2O3层和λ36.6 nm厚的Ag层，在λ= 969 nm处，λ= 969 nm的量级（FOM）的数量级为19212.67 RIU-1，可以从提出的石墨烯传感器中获得。上面的FOM实质上大于声称具有较大FOM值的现有（报告）等离子体传感器。本文的发现对于开发性能大大增强的表面等离子体激元推理生物传感器至关重要。

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