D型对称双芯光子晶体光纤双谐振峰折射率传感器  

Refractive Index Sensor with Double Resonance Peaks for D-Type Symmetric Two-Core Photonic Crystal Fiber

作　　者：肖功利[1] 张开富 杨宏艳[2,3] 杨寓婷 杨秀华 窦婉滢 曾丽珍 Xiao Gongli;Zhang Kaifu;Yang Hongyan;Yang Yuting;Yang Xiuhua;Dou Wanying;Zeng Lizhen(Guangxi Key Laboratory of Precision Navigation Technology and Application,Guilin University of Electronic Technology,Guilin,Guangxi 541004,China;Guangxi Key Laboratory of Automatic Detecting Technology and Instruments,Guilin University of Electronic Technology,Guilin,Guangxi 541004,China;School of Electronic Engineering and Automation,Guilin University of Electronic Technology,Guilin,Guangxi 541004,China;Graduate School,Guilin University of Electronic Technology,Guilin,Guangxi 541004,China)

机构地区：[1]桂林电子科技大学广西精密导航技术与应用重点实验室,广西桂林541004 [2]桂林电子科技大学广西自动检测技术与仪器重点实验室,广西桂林541004 [3]桂林电子科技大学电子工程与自动化学院,广西桂林541004 [4]桂林电子科技大学研究生院,广西桂林541004

出　　处：《光学学报》2020年第12期62-69,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61765004,61465004,61874036);广西自然科学基金(2017GXNSFAA198164,2016GXNSFAA380006);桂林电子科技大学研究生教育创新计划(2019YCXS028,2017YJCX41,YCSW2018143);广西精密导航技术与应用重点实验室基金(DH201907,DH201804);广西自动检测技术与仪器重点实验室基金(YQ18110)

摘　　要：设计了一种新颖的D型对称双芯光子晶体光纤表面等离子体共振折射率传感器。利用该结构中双芯与金属传感层界面处产生的表面等离子体共振效应,结合不同的金属传感层,在可见光与近红外波段获得显著的双谐振峰现象。采用有限元法分析了双谐振峰的相互独立性,研究了该结构中空气孔间距、直径和金属传感层厚度、纳米柱半径及纳米柱间距对双峰的影响。结果表明,在优化结构参数后,双峰谐振使得传感器具有良好的传感性能,在折射率为1.32~1.43内,与双峰对应的平均灵敏度分别高达6209.09 nm/RIU和8390.91 nm/RIU,品质因数分别大于19.64 RIU-1和27.06 RIU-1。该研究结果为光子晶体光纤表面等离子体生物传感器的设计提供了理论参考。Herein,we designed a novel D-type symmetric two-core photonic crystal fiber surface plasmon resonance refractive index sensor.A significant dual resonance peak phenomenon occurred in the visible and near-infrared bands when the surface plasmon resonance effect generated at the interface between two-core and metal-sensing layer in this structure is combined with different metal-sensing layers.The mutual independence of the dual resonance peaks was analyzed using the finite element method.Moreover,the effects of the spacing and diameter of air holes,the thickness of metal-sensing layers,and the radius and spacing of nanometer columns in the structure on the dual peaks were examined.Results demonstrate that after the structural parameters are optimized,double peak resonance facilitates the good sensing performance of the sensor.In the refractive index range of 1.32-1.43,the respective average sensitivities corresponding to the double resonance peaks are up to 6209.09 nm/RIU and 8390.91 nm/RIU,and the figures of merit are greater than 19.64 RIU-1and 27.06 RIU-1.These results provide a theoretical reference for the design of a photonic crystal fiber surface plasmon biosensor.

关 键 词：光纤光学 折射率传感器 光子晶体光纤 双谐振峰 表面等离子体共振 

分 类 号：TN253[电子电信—物理电子学]