Study on terahertz spectra of SO_2 and H_2S

作     者：CAI He WANG Dong SHEN JingLing 

作者机构：Beijing Key Laboratory for Terahertz Spectroscopy and Imaging Key Laboratory of Terahertz Optoelectronics Ministry of Education Department of Physics Capital Normal University Beijing Institute of Environment Features 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2013年第56卷第4期

页      面：685-690页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 070302[理学-分析化学] 0703[理学-化学] 0803[工学-光学工程] 

基　　金：supported by the Science and Technology Program of Beijing Educational Committee (Grant No. KM200910028005) the Natural Science Foundation of Beijing (Grant No. 4102016) 

主　　题：spectroscopy terahertz wave rotational mode gas molecule 

摘      要：The spectral characteristics of air pollution gas sulfur dioxide and hydrogen sulfide has been studied experimentally and theo-retically in the range of 0.2-2.6 THz. The gases absorption spectra of sulfur dioxide and hydrogen sulfide, as measured by terahertz Time-Domain Spectroscopy (THz-TDS) technique, show equi-spaced absorption peaks. The peak intervals are varied for different gas and may relate with the molecule structures and rotation modes. We have calculated the intervals of rotational transition frequency according to the gases molecule structure and the rotational modes. The results are consistent with experimental results which confirm the suggestion that the absorption is coming from the molecular rotational transition. The study suggests a technique to detect air pollutants by THz-TDS and the rotational modes of gas molecules.