一氧化碳的太赫兹时域光谱研究

Terahertz Time-Domain Spectroscopic Study of Carbon Monoxide

以飞秒激光为基础的太赫兹时域光谱技术是一种新型的相干远红外光谱测量技术。文章首次利用太赫兹时域光谱技术测量了一氧化碳气体在0．2～2．5太赫兹频谱范围内的吸收光谱。实验结果表明，一氧化碳在此波段有明显的特征吸收峰，峰值位置与理论计算得到的结果有很好的一致性。随着压强的减小，吸收峰变尖锐。研究一氧化碳的太赫兹吸收光谱特性，对于快速、准确检测环境中有害气体以及排除安全隐患具有重要意义。

Terahertz time-domain spectroscopy is a new coherent spectral technique based on femtosecond laser technology. The radiation band belongs to far infrared. This paper presents the absorption spectra of carbon monoxide measured by terahertz time-domain spectroscopy in the frequency range between 0. 2 and 2. 5 THz. The experimental results indicate that the carbon monoxide has many distinct characteristic spectra between 0. 2 and 2. 5 THz which agree with the calculated results. The absorption peaks become sharper with decreasing the pressure. This work establishes the basic spectra data for the future identification and characterization of carbon monoxide, and it is very significative to measure the harmful suhstance in the atmosphere hy terahertz technology.