29 July 2003 Terahertz time-domain spectroscopy of atmosphere with different humidity
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Water, at both the liquid and gas phase, maintains a high absorption coefficient in the terahertz (THz) frequency range. As a result, a major limitation of THz time-domain spectroscopy (THz-TDS) for real-world applications is water attenuation. The humidity in the atmosphere affects THz waves (T-ray) for long distance measurement and tracing materials, such as explosive materials. We measure air at various humidity and we report how humidity affects THz-TDS measurement. We also report the changes to spectrum amplitudes by measuring water vapor absorption in a vacuum chamber.
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Tao Yuan, Tao Yuan, Haibo Liu, Haibo Liu, Jingzhou Xu, Jingzhou Xu, Fatemeh Al-Douseri, Fatemeh Al-Douseri, Ying Hu, Ying Hu, Xi-Cheng Zhang, Xi-Cheng Zhang, "Terahertz time-domain spectroscopy of atmosphere with different humidity", Proc. SPIE 5070, Terahertz for Military and Security Applications, (29 July 2003); doi: 10.1117/12.504295; https://doi.org/10.1117/12.504295


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