SPR based fiber-optic sensor with enhanced electric field intensity and figure of merit using different single and bimetallic configurations
SPR based fiber-optic sensor with enhanced electric field intensity and figure of merit using different single and bimetallic configurations
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DOI：
10.1016/j.optcom.2016.01.014
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发表时间：
2016-05
影响因子：
2.4
通讯作者：
R. Tabassum;B. D. Gupta
中科院分区：
文献类型：
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作者：
R. Tabassum;B. D. Gupta
我们提出了数值模拟的电场强度，灵敏度和品质因数（FOM）不同的单一和双配置的表面等离子体共振（SPR）光纤传感器。所考虑的金属是金（Au）、银（Ag）、铜（Cu）和铝（Al）。在电场强度，灵敏度，FOM，化学稳定性和传感器的制造成本方面的传感器的整体性能进行评估。更具体地说，在感测参数方面，发现Al和Cu双金属片配置比单个和其他双金属片配置的传感器好得多。对光纤SPR传感器中Al和Cu的双折射结构进行了实验研究。此外，当以叠层组合使用时，两种材料的膜粘附能力得到改善，这进一步改善了传感器的化学稳定性;这是Al和Cu在其单层配置中的严重问题。具有金作为外层的组合是更化学稳定的，但发现在感测参数和制造成本方面较弱，因为金是非常昂贵的。
We present numerical simulations of electric field intensity, sensitivity and figure of merit (FOM) for different single and bimetallic configured surface plasmon resonance (SPR) fiber optic sensors. The metals considered are gold (Au), silver (Ag), copper (Cu) and aluminum (Al). The overall performance of the sensor is evaluated in terms of electric field intensity, sensitivity, FOM, chemical stability and the cost of fabrication of the sensor. More specifically, in terms of the sensing parameters, Al and Cu bimetallic configuration is found to be much better than the single and the other bimetallic configured sensors. The bimetallic configuration of Al and Cu for fiber optic SPR sensor is also evaluated experimentally. Additionally, the film adhesion capability of both the materials gets improved when used in bimetallic combination which further improves the chemical stability of the sensor; this is a serious problem with Al and Cu in their single layer configuration. The combinations which possess gold as outer layer are more chemically stable but found to be weaker in terms of sensing parameters and cost of fabrication as gold is highly expensive.