Study on terahertz spectra of SO2 and H2S

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） techn...

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Bibliographic Details
Published in:Science China. Physics, mechanics & astronomy mechanics & astronomy, 2013-04, Vol.56 (4), p.685-690
Main Authors: Cai, He, Wang, Dong, Shen, JingLing
Format: Article
Language:English
Subjects:
Absorption
Absorption spectra
Air pollution
Astronomy
Classical and Continuum Physics
H2S
Hydrogen sulfide
Intervals
Molecular structure
Observations and Techniques
Physics
Physics and Astronomy
SO2
Sulfur
Sulfur dioxide
Terahertz frequencies
THz-TDS
Time domain analysis
光谱特性
分子结构
大气污染气体
太赫兹时域光谱技术
旋转模式
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Summary: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.
ISSN:1674-7348
1869-1927
DOI:10.1007/s11433-013-5042-4