Molecular structure and vibrational dynamics studied by Terahertz radiation spectroscopy

太赫兹频率区存在于光学和微波区之间，凝聚相中的集体运动，如分子间运动，有其光谱分量。尽管了解太赫兹频率区的分子动力学很重要，但这一区域一直被称为未被探索的频率区。在这项工作中，量子电子学和分子科学的研究人员开发了太赫兹光谱仪，并共同研究了太赫兹区域的光谱。特别是，通过高分辨率测量观察分子晶体中的同位素位移，我们成功地严格指定了太赫兹谱带。

The THz frequency region exists between the optical and microwave regions, where collective motions such as intermolecular motion in condensed phases have their spectral components. Despites the fact that understanding of molecular dynamics in the THz frequency region is important, this region has been referred to as unexplored frequency region. In this work researchers in quantum electronics and molecular science developed THz spectrometers and investigated the spectrum in the THz region together cooperatively. Especially, by observing isotope shifts in the molecular crystals by high-resolution measurements, we have succeeded in assigning the THz bands rigorously.