正入射反射式太赫兹光谱测量的不确定度分析（英文）  

Uncertainty in normal reflection terahertz spectroscopy measurement

作　　者：杨霏[1] 刘丽萍[1] 宋茂江[1] 韩锋[1] 沈力[1] 胡鹏飞[1] 张放[2] 

机构地区：[1]贵州省计量测试院,贵州贵阳550003 [2]贵阳职业技术学院生化工程系,贵州贵阳550081

出　　处：《红外与毫米波学报》2017年第1期10-14,19,共6页Journal of Infrared and Millimeter Waves

基　　金：Supported by National Natural Science of China(21503045,61540038);Guizhou Science and Technology Department(J20142107,SY20143065)

摘　　要：太赫兹时域光谱技术能够快速、宽频带测量物质在太赫兹频段的光学或介电常数,是物质识别的重要技术.光学常数的测量准确度完全受到复杂的测量过程和数据处理所影响.针对正入射反射式THz光谱测量,分析了在测量材料介电特性过程中的误差来源,它们包括太赫兹幅值误差、位置误差以及样品倾斜误差.建立了单独表征每个误差来源对于光学常数影响的不确定度分量的公式.利用MATLAB仿真了每个误差来源对于光学参数不确定度的影响.Terahertz time-domain spectroscopy （ THz-TDS ） is a significant technique for characterizing materials as it allows fast and broadband measurement of optical constants in the THz regime. The measurement precision of the constants is highly influenced by the complicated measurement procedure and data processing. With particular em- phasis on normal reflection measurement, the sources of error including amplitude errors and positioning error and sample misalignment in determining the dielectric properties of materials were analyzed. The uncertainty that char- acterizes the influence on the optical constants for each source was formulated independently. Several simulations were carried out to illustrate the relations between the error sources and the uncertainty of the optical constants.

关 键 词：太赫兹 时域光谱 正反射 测量不确定度 光学常数 

分 类 号：O433.1[机械工程—光学工程]