Ultrafast hydrogen bond dynamics of liquid water revealed by terahertz-induced transient birefringence
作者机构：Beijing Key Laboratory for Precision Optoelectronic Measurement Instrument and TechnologySchool of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China Beijing Advanced Innovation Center for Imaging Technology and Key Laboratory of Terahertz Optoelectronics(MoE)Department of PhysicsCapital Normal UniversityBeijing 100048China Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China The Institute of OpticsUniversity of RochesterRochesterNY 14627USA
出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)
年 卷 期：2020年第9卷第1期
页 面：707-716页
核心收录：
学科分类：0808[工学-电气工程] 070207[理学-光学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学]
基 金：supported by the Beijing Natural Science Foundation(Grant No.JQ18015) the National Natural Science Foundation of China(Grant Nos.61935001 and 61905271) the Guangdong Basic and Applied Basic Research Foundation(Grant No.2020A1515011083) the Beijing Advanced Innovation Center for Imaging Theory and Technology
摘 要：The fundamental properties of water molecules,such as their molecular polarizability,have not yet been *** hydrogen bond network is generally considered to play an important role in the thermodynamic properties of *** terahertz(THz)Kerr effect technique,as a novel tool,is expected to be useful in exploring the low-frequency molecular dynamics of liquid ***,we use an intense and ultrabroadband THz pulse(peak electric field strength of 14.9 MV/cm,centre frequency of 3.9 THz,and bandwidth of 1–10 THz)to resonantly excite intermolecular modes of liquid *** THz field-induced transient birefringence signals are observed in a free-flowing water *** propose a hydrogen bond harmonic oscillator model associated with the dielectric susceptibility and combine it with the Lorentz dynamic equation to investigate the intermolecular structure and dynamics of liquid *** mainly decompose the bipolar signals into a positive signal caused by hydrogen bond stretching vibration and a negative signal caused by hydrogen bond bending vibration,indicating that the polarizability perturbation of water presents competing contributions under bending and stretching conditions.A Kerr coefficient equation related to the intermolecular modes of water is *** ultrafast intermolecular hydrogen bond dynamics of water revealed by an ultrabroadband THz pump pulse can provide further insights into the transient structure of liquid water corresponding to the pertinent modes.
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