Investigation of U-shape tapered plastic optical fibers based surface plasmon resonance sensor for RI sensing
Investigation of U-shape tapered plastic optical fibers based surface plasmon resonance sensor for RI sensing
复制标题
用于 RI 传感的基于 U 形锥形塑料光纤的表面等离子体共振传感器的研究
DOI：
10.1016/j.ijleo.2021.168461
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发表时间：
2021-12-11
期刊：
影响因子：
3.1
通讯作者：
Chen, Ming
中科院分区：
文献类型：
--
作者：
Teng, Chuanxin;Li, Maosen;Chen, Ming
提出了一种基于U型锥形塑料光纤的表面等离子体共振（SPR）折射率传感器。比较了直型和U型TPOF探头的RI敏感性能，并实验研究了锥度比、水平和垂直镀膜方式对U型探头RI敏感性能的影响。实验结果表明，该传感器具有良好的线性度，在锥度比为6.7、垂直镀Au膜的U形探头上，在折射率为1.335-1.41的范围内，可获得1534.53 nm/RIU的灵敏度。该探针具有结构简单、制作方便等优点，在生物化学传感领域具有潜在的应用价值。
In this paper, a U-shape tapered plastic optical fibers (TPOFs) based surface plasmon resonance (SPR) sensors are fabricated and proposed for refractive index (RI) sensing. The RI sensing per-formances for the straight and U-shape TPOFs probes are compared, and the influences of the taper ratios and Au-film coating methods, horizontal and vertical coating, on the RI sensing performance for the U-shape probes are investigated experimentally. The experimental results show that the proposed sensor has a good linearity, and a sensitivity of 1534.53 nm/RIU in the RI sensing range of 1.335-1.41 can be obtained for the U-shape probe with taper ratio of 6.7 and vertical coating of Au film. The proposed probe has the advantages of easy fabrication and simple structure, which has potential applications in fields of biochemical sensing.