Observation of Sublimation of Ice using Terahertz Spectroscopy

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. Ice was observed to undergo sublimation at atmospheric pressure at temperatures above 240 K, and its velocity increased in proportion to temperature. 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尽管已有诸多研究围绕水的相变展开探讨，但针对冰的升华现象的研究却较为少见。本研究发现，可通过太赫兹（THz）光谱学观测冰的升华过程。实验观测到，在大气压条件下，当温度高于240 K时冰即发生升华，且升华速率随温度升高呈正比增长。当温度超过某一临界值时，升华过程中的吸收系数会出现升高。上述研究结果表明，水在零下温度环境下的相变过程或存在值得关注的现象，同时也证明太赫兹光谱学在水与冰的相关检测中具有应用价值。