Interaction dynamics of solvated electron with water investigated by terahertz time-resolved dielectric spectroscopy

本研究主要针对水溶液的时间分辨太赫兹光谱进行实验研究和技术开发。首先，我们进行了稳态太赫兹光谱的水离子溶液。因此，我们成功地获得了一个实验证据的存在的离子效应，削弱氢键结构在溶液中，证明了THz光谱的有效性，对溶液样品的研究。第二，开发了使用液体片的无窗方法。该方法解决了传统的溶液样品池法中强泵浦激光脉冲对窗口的损伤问题。在这里，已经开发了可以产生具有从50到120微米的可控厚度的液体片的喷嘴，并针对THz光谱进行了优化。

Experimental and technical developments for the time-resolved terahertz (THz) spectroscopy on aqueous solutions have been made in this study. First, we performed the steady-state THz spectroscopy on aqueous ionic solutions. As a result, we successfully obtained an experimental evidence for the existence of the ion effects that weaken hydrogen bonding structure in solution, demonstrating the effectiveness of THz spectroscopy for studies on a solution sample. Second, a window-less method using a liquid sheet was developed. This method salves the problem of damaging windows due to a strong pump laser pulse in the conventional method using a solution sample cell. Here, a nozzle which can produce a liquid sheet with controllable thickness from 50 to 120 micrometer has been developed and optimized to THz spectroscopy.