角度型表面等离子体振荡传感器测量精度提高的新方法  

Enhanced measurement precision of angular surface plasmon resonance sensor

作　　者：李玮翔[1] 马晓红[1] 吕晖[1] 赵华凤[1] 

机构地区：[1]清华大学电子工程系,北京100084

出　　处：《应用光学》2012年第2期342-346,共5页Journal of Applied Optics

摘　　要：设计了一种基于棱镜的角度型表面等离子体振荡自动测量系统,建立了共轴双旋转台的机械结构,提出了新型扫描的角度测量法,得到表面等离子体振荡谐振曲线。研究了影响系统多次测量一致性的因素,提出了减少采样点、提高单点数据采集次数,并采用三级变步长的测量方法,测量时间缩短至小于原来的1/10,使系统测量精度从1E-4折射率单位提高到了4E-5折射率单位。An angular surface plasmon resonance measurement system based on prism was de- signed. The mechanical structure with coaxial double layer rotating table was setup. We pro- posed a novel scanning angular measurement method and obtained the surface plasmon reso- nance curve. The impact factors on the consistency of multiple measurements were studied, the new method decreased the measuring point number, increased the sample data on one point, and used three kinds of variable steps. The measurement time was decreased to 1/10, and the precision reached 4E-5 refractive index level from 1E-4 refractive index level.

关 键 词：表面等离子体振荡 光学传感器 角度测量 精度 

分 类 号：TN206[电子电信—物理电子学]