摘要
采用太赫兹反射式时域光谱系统,测量了包括正己烷、液状石蜡、无水酒精和水在内的四种有机溶剂的反射式时域光谱,并根据实验模型设计了两种计算方法提取液体样品的光学参数。此外,还将反射算法得到的样品光学参数与透射算法的结果进行比较,验证了反射式系统对应算法结果的正确性,解决了透射系统无法准确测量和提取对太赫兹吸收很强的样品的光学参数的难题。
Four kinds of organic solvents,including positive hexane,liquid paraffin,ethyl alcohol,and water,were measured by using terahertz time-domain reflection spectroscopy.According the experiment models,two methods can be used to extract optical parameters.Refractive index and absorption coefficient for these four solvents were extracted with two methods and were compared with the results obtained by transmission measurements,which verified that these methods are correct.This work solved the problem that the optical parameters of sample absorbing strongly terahertz cannot be measured and extracted by using terahertz time-domain transmission system.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2012年第6期1471-1475,共5页
Spectroscopy and Spectral Analysis
基金
国家重点基础研究计划项目(2007CB310408)
北京市自然科学基金重点项目(KZ201110028035)资助
关键词
太赫兹反射式时域谱
有机溶剂
折射率
吸收系数
Terahertz time-domain reflection spectroscopy
Organic solvents
Refractive index
Absorption coefficient
