Nonlinear response of liquid water induced by terahertz pulses

Hang Zhao; Yong Tan; LiangLiang Zhang; Cunlin Zhang; Yuejin Zhao

doi:10.1117/12.2651598

16 December 2022 Nonlinear response of liquid water induced by terahertz pulses

Hang Zhao, Yong Tan, LiangLiang Zhang, Cunlin Zhang, Yuejin Zhao

Proceedings Volume 12324, Infrared, Millimeter-Wave, and Terahertz Technologies IX; 123240B (2022) https://doi.org/10.1117/12.2651598
Event: SPIE/COS Photonics Asia, 2022, Online Only

Abstract

In this work, we use terahertz (THz) pulses and near-infrared laser pulses to excite molecular motion modes of liquid water in resonant and non-resonant states, and record the corresponding THz Kerr effect (TKE) and optical Kerr effect (OKE) curves at the sub-picosecond time scale. We analyze the frequency dependence and energy dependence of TKE and OKE responses in water. The characteristics and advantages of the two schemes in low-frequency molecular dynamics observation of liquid water are summarized by calculating the signal-to-noise ratio (SNR). Our work provides valuable insights into the microscopic origin of dielectric properties in water, and provides a new method for observing low-frequency molecular motion in various aqueous solutions and even in biological tissues.

Conference Presentation

Citation Download Citation

Hang Zhao, Yong Tan, LiangLiang Zhang, Cunlin Zhang, and Yuejin Zhao "Nonlinear response of liquid water induced by terahertz pulses", Proc. SPIE 12324, Infrared, Millimeter-Wave, and Terahertz Technologies IX, 123240B (16 December 2022); https://doi.org/10.1117/12.2651598

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