基于复合膜的双通道光纤表面等离子共振传感器  

A Dual-channel Optical Fiber Surface Plasmon Resonance Sensor Based on Composite Membrane

作　　者：顾钦顺 葛益娴[1,2] 张鹏 沈令闻[1] 郭志勇 刘纯纯 GU Qinshun;GE Yixian;ZHANG Peng;SHEN Lingwen;GUO Zhiyong;LIU Chunchun(School of Electronics&Information Engineering,Nanjing University of Information Science&Technology.Nanjing 210044,CHN;Jiangsu Collaborative Innovation Center Atmospheric Environment and Equipment Technology,Nanjing 210044,CHN)

机构地区：[1]南京信息工程大学电子与信息工程学院,南京210044 [2]江苏省大气环境与装备技术协同创新中心,南京210044

出　　处：《半导体光电》2020年第5期638-643,共6页Semiconductor Optoelectronics

基　　金：国家自然科学基金项目(61307061);江苏高校优势学科Ⅲ期建设工程资助项目。

摘　　要：基于表面等离子共振的原理,设计了一种基于复合膜的双通道光纤表面等离子传感器。利用FDTD Solutions仿真软件分析了传感器的电场传输模式,比较了单层金属Ag膜与AgITO复合膜的性能,并对比分析了单通道与双通道结构。结果表明:采用Ag-ITO与Au-TiO2复合膜的双通道结构在灵敏度和品质因数等各项性能上要明显优于传统单层金属膜与单通道结构。设计的传感器不仅可以通过两条传感通道共振偏移范围的高区分度来解决共振波长的串扰问题,而且双通道结构中一条传感通道也可以作为参考通道为传感器提供自补偿能力。Based on the principle of surface plasmon resonance(SPR),a dual-channel optical fiber surface plasmon resonance sensor based on composite membrane was designed.The simulation software of FDTD Solutions was used to simulate and analyze the electric field transmission mode of the sensor,the performance of the single-layer metal Ag film and Ag-ITO composite membrane was compared,and the structure of single channel and double channel was analyzed comparatively.The results show that the sensitivity and quality factors of the dualchannel structure with Ag-ITO and Au-TiO2 composite membrane are obviously better than that of the traditional single-layer metal film and single-channel structure.The designed sensor can not only solve the crosstalk problem of resonance wavelength by the high differentiation of resonance drift range of the two sensor channels,but also one of the sensor channels in the dual-channel structure can be used as a reference channel to provide self-compensation capability for the sensor.

关 键 词：光纤传感器 表面等离子共振 双通道 复合膜 共振波长串扰 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]