一种由HE_(1,1)模激发SPR的PCF折射率传感器  

A PCF-SPR Refractive Index Sensor Excited by HE_(1,1) Mode

作　　者：刘超[1] 付海昊 吕靖薇 王建鑫 LIU Chao;FU Hai-hao;L Jing-wei;WANG Jian-xin(School of Physics and Electronic Engineering,Northeast Petroleum University,Daqing 163000,China)

机构地区：[1]东北石油大学物理与电子工程学院,黑龙江大庆163000

出　　处：《哈尔滨理工大学学报》2022年第5期23-29,共7页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金面上项目(51474069);黑龙江省自然科学基金(LH2021F007);中国博士后基金(2020M670881).

摘　　要：随着光纤传感技术的不断发展,基于表面等离子体共振(SPR)的光子晶体光纤(PCF)传感器成为了当前传感领域的热点。目前激发SPR的模式主要以LP0,1为主,而利用轨道角动量(OAM)模式激发SPR的PCF传感器的研究很少。采用有限元仿真的方法提出了一种由OAM的基模(HE_(1,1)模)激发SPR的PCF传感器,并对其相位匹配、波长灵敏度、FOM等性能进行了研究。数值结果表明:SPR传感器可检测折射率范围在1.29~1.37内的分析物,最大波长灵敏度为10000 nm/RIU,且FOM高达200.89 RIU^(-1);另外,采用金介质填充的方法替代传统镀膜工艺降低了传感器的制备难度。该PCF-SPR传感器在安全监测、石油测井等方面有着巨大应用。With the continuous development of optical fiber sensing technology,photonic crystal fiber(PCF)sensors based on surface plasmon resonance(SPR)have become a hot spot in the current sensing field.At present,the modes for exciting SPR are mainly LP_(0.1),and there are few studies on PCF sensors using orbital angular momentum(OAM)mode to excite SPR.A PCF sensor with SPR excited by the fundamental mode(HE_(1,1)mode)of OAM is proposed by finite element simulation,and its phase matching,wavelength sensitivity,FOM and other properties are studied.Numerical results indicate that the SPR sensor can detect analytes with a refractive index in the range of 1.29~1.37,the maximum wavelength sensitivity is 10,000 nm/RIU^(-1),and the FOM is as high as 200.89 RIU.In addition,using the gold dielectric filling method to replace the traditional coating process reduces the fabrication difficulty of the sensor.The PCF-SPR sensor has great applications in safety monitoring,oil logging,and so on.

关 键 词：表面等离子体共振 光子晶体光纤 传感器 波长灵敏度 振幅灵敏度 

分 类 号：TN253[电子电信—物理电子学]