太赫兹科学与电子信息学报2017，Vol.15Issue(4)：548-552,5.DOI:10.11805/TKYDA201704.0548
利用太赫兹时域光谱技术检测水和氯化钠溶液
Detection of NaCl solutions using terahertz time-domain spectroscopy
摘要
Abstract
Terahertz spectrum is corresponding with vibration and rotation of liquid molecules. It is suitable to identify and research the liquid molecular dynamics. As a powerful spectral detection technology, Terahertz Time-Domain Spectroscopy(THz-TDS) is widely applied in solution detection. The absorption coefficient, refractive index and dielectric function of solutions can be extracted based on terahertz time-domain spectroscopy. Water and NaCl exist in most biological tissues, which are very important for life. In this paper, water and NaCl solutions are detected under room temperature by THz-TDS technique in the range of 0.2-1.5 THz. The terahertz dielectric function of the water and NaCl (sodium chloride) solutions is fitted by Debye model, from which the dielectric relaxation time can be obtained. By means of dielectric relaxation process, it is found that the characteristic time of molecular movement and the information related to the liquid molecular structure and movement are obtained. The terahertz dielectric function of the water and NaCl solutions is fitted by Debye model, where the dielectric relaxation time of water and NaCl solutions is 9.6 ps and 10.7 ps respectively. By means of dielectric relaxation process, it is found that the characteristic time of molecular movement and the information related to the liquid molecular structure and movement are obtained.关键词
太赫兹时域光谱/水/氯化钠溶液/介电函数/德拜模型Key words
terahertz time-domain spectroscopy/water/NaCl solution/dielectric function/Debye model分类
信息技术与安全科学引用本文复制引用
王萃萃,刘尚建,赵晓晶,左剑,张存林..利用太赫兹时域光谱技术检测水和氯化钠溶液[J].太赫兹科学与电子信息学报,2017,15(4):548-552,5.基金项目
国家科技部"国家重大科学仪器设备开发专项"基金资助项目(2012YQ1400050901) （2012YQ1400050901）
国家自然科学基金资助项目(11204190) （11204190）
北京市教育委员会科技计划面上资助项目(KM201610028005) （KM201610028005）
首都师范大学交叉科研项目(008175304400) （008175304400）
