Han Haixia, Hou Donglian, Zhao Lei, Luan Nannan, Song Li, Liu Zhaohong, Lian Yudong, Liu Jianfei, Hu Yongsheng
Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, Tianjin 300401, China.
State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
Sensors (Basel). 2020 Feb 13;20(4):1009. doi: 10.3390/s20041009.
An H-shaped photonic crystal fiber (PCF)-based surface plasmon resonance (SPR) sensor is proposed for detecting large refractive index (RI) range which can either be higher or lower than the RI of the fiber material used. The grooves of the H-shaped PCF as the sensing channels are coated with gold film and then brought into direct contact with the analyte, which not only reduces the complexity of the fabrication but also provides reusable capacity compared with other designs. The sensing performance of the proposed sensor is investigated by using the finite element method. Numerical results show that the sensor can work normally in the large analyte RI () range from 1.33 to 1.49, and reach the maximum sensitivity of 25,900 nm/RIU (RI units) at the range 1.47-1.48. Moreover, the sensor shows good stability in the tolerances of 10% of the gold-film thickness.
提出了一种基于H形光子晶体光纤（PCF）的表面等离子体共振（SPR）传感器，用于检测大折射率（RI）范围，该范围可以高于或低于所使用的光纤材料的RI。作为传感通道的H形PCF的凹槽涂有金膜，然后与分析物直接接触，这不仅降低了制造的复杂性，而且与其他设计相比具有可重复使用的能力。采用有限元方法研究了所提出传感器的传感性能。数值结果表明，该传感器在1.33至1.49的大分析物RI（）范围内能够正常工作，在1.47 - 1.48范围内达到最大灵敏度25,900 nm/RIU（RI单位）。此外，该传感器在金膜厚度10%的公差范围内表现出良好的稳定性。
