4 November 2010 Study of atmospheric pollution using terahertz wave
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Terahertz time-domain spectroscopy (THz-TDS) is a new coherent spectral technique. In this paper the spectral characteristics of air pollution gas, sulfur dioxide and hydrogen sulfide, had been measured with THz-TDS in the range of 0.2-2.6THz. The result shows that both the gases have equi-spaced absorption peaks and different gases have different intervals. We also investigated the influence of pressure on absorption spectrum by changing the pressure of the gases in a chamber. The experimental results indicate that the absorption peaks become sharper with increasing the pressure. Our experiments prove that terahertz Time-Domain Spectroscopy technique should be a powerful candidate for detecting atmospheric pollutants.
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He Cai, He Cai, Dong Wang, Dong Wang, Jingling Shen, Jingling Shen, } "Study of atmospheric pollution using terahertz wave", Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78542J (4 November 2010); doi: 10.1117/12.868779; https://doi.org/10.1117/12.868779

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