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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.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);

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