Study of atmospheric pollution using terahertz wave

He Cai; Dong Wang; Jingling Shen

doi:10.1117/12.868779

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4 November 2010 Study of atmospheric pollution using terahertz wave

He Cai, Dong Wang, Jingling Shen

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Proceedings Volume 7854, Infrared, Millimeter Wave, and Terahertz Technologies; 78542J (2010) https://doi.org/10.1117/12.868779
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

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, Dong Wang, and Jingling Shen "Study of atmospheric pollution using terahertz wave", Proc. SPIE 7854, Infrared, Millimeter Wave, and Terahertz Technologies, 78542J (4 November 2010); https://doi.org/10.1117/12.868779

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