Although many studies have investigated the phase change of water, few have focused on the sublimation of ice. This study revealed that ice sublimation can be observed using terahertz (THz) spectroscopy. From measurements in the range of 210–270 K, the sublimation was observed over the entire temperature range and the rate of sublimation was increased proportionally with temperature. Particularly on a time scale of a few hundred minutes, the sublimation progresses visibly above 250 K. Above a certain temperature, the absorption coefficient increased during sublimation. These findings suggest that an interesting phenomenon may occur in the phase change of water at sub-zero temperatures, indicating that THz spectroscopy would be useful for measuring water and ice.

尽管许多研究已经研究了水的相变，但很少有人关注冰的升华。这项研究表明，可以使用太赫兹（THz）光谱观察到冰的升华。通过在210–270 K范围内的测量，可以在整个温度范围内观察到升华，并且升华速率随温度成比例增加。特别是在几百分钟的时间范围内，升华在250 K以上明显进行。在一定温度以上，升华期间吸收系数增加。这些发现表明，在零以下温度下，水的相变中可能会出现有趣的现象，这表明太赫兹光谱法可用于测量水和冰。