基于正十六边形光子晶体光纤的表面等离子体共振传感器

Surface Plasmon Resonance Sensor Based on Photonic Crystal Fiber in Regular Hexadecagon

提出了一种新型传感器结构,基于正十六边形光子晶体光纤(PCF)的D型表面等离子体共振(SPR)传感器,实现了折射率(RI)和温度的同时测量,同时实现了较大范围内折射率和温度的动态检测。可以同时实现折射率为1.230~1.355、温度为5~85℃的检测。结果显示,折射率在1.330~1.355范围内时,灵敏度为1645.7 nm/RIU;在整个可测范围内最大灵敏度为1497.6 nm/RIU。温度范围在20~60℃时,灵敏度最高可达-2.68 nm/℃;在整个可测范围内灵敏度最高可达-3 nm/℃。此结构的优势在于可在较大范围内独立检测RI和温度的同时又能保证相对较高的灵敏度。

A novel sensor structure,D-type surface plasmon resonance(SPR) sensor based on regular hexagon photonic crystal fiber(PCF),is proposed to measure the refractive index(RI) and temperature simultaneously,and measure the refractive index and temperature dynamically in a large range.It can simultaneously detect the refractive index of 1.230—1.355 and the temperature of 5—85 ℃.The results show that when RI is in the range of 1.330—1.355,the sensitivity is 1645.7 nm/RIU;the maximum sensitivity in the whole detectable range is 1497.6 nm/RIU.When the temperature range is 20—60 ℃,the sensitivity can reach up to-2.68 nm/℃,and the sensitivity can reach up to-3 nm/℃ in the whole measurable range.The superiority of this structure is that it is sensitive to a large dynamic detection range of RI and temperature with relatively high sensitivity.