College of Precision Instrument and Opto-electronics Engineering, Key Laboratory of Opto-Electronics Information Technology, Ministry of Education, Tianjin University, Tianjin 300072, China.
Sensors (Basel). 2012;12(9):12016-25. doi: 10.3390/s120912016. Epub 2012 Aug 31.
A kind of surface plasmon resonance sensor based on grapefruit photonic crystal fiber (PCF) filled with different numbers of silver nanowires has been studied in this paper. The surface plasmon resonance modes and the sensing properties are investigated comprehensively using the finite element method (FEM). The simulation results show that the intensity sensitivity is related to nanowire numbers and the distance between two nanowires. The optimum value obtained is 2,400 nm/RIU, corresponding to a resolution of 4.51 × 10(-5) RIU with a maximum distance of 2 μm. To a certain extent, the PCF filled with more nanowires is better than with just one. Furthermore, the air holes of grapefruit PCF are large enough to operate in practice. Moreover, the irregularity of the filled nanowires has no effect on sensitivity, which will be very convenient for the implementation of experiments.
本文研究了一种基于填充不同数量银纳米线的柚子状光子晶体光纤（PCF）的表面等离子体共振传感器。采用有限元法（FEM）对表面等离子体共振模式和传感特性进行了全面研究。模拟结果表明，强度灵敏度与纳米线数量和两根纳米线之间的距离有关。最佳值为 2400nm/RIU，对应于最大距离为 2μm 时的分辨率为 4.51×10^(-5)RIU。在一定程度上，填充更多纳米线的 PCF 优于只填充一根纳米线的 PCF。此外，柚子状 PCF 的空气孔足够大，可以在实际中使用。此外，填充纳米线的不规则性对灵敏度没有影响，这将非常方便实验的实施。
