Dynamics of optical polarizability of liquid water exposed to intense laser light

被引：8

作者：

Kononenko, Vitali V. ^{[1
]}

Gololobov, Viktor M. ^{[1
]}

Konov, Vitaly, I ^{[1
]}

机构：

[1] Russian Acad Sci, Prokhorov Gen Phys Inst, Vavilov Str 37, Moscow, Russia

来源：

OPTICS LETTERS | 2020年 / 45卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

HYDRATED ELECTRON; EXCESS ELECTRONS; FEMTOSECOND; STATE;

D O I：

10.1364/OL.45.000256

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Variations in the optical properties of pure water induced by a femtosecond laser (wavelength 800 nm, intensity similar to 10(12) W/cm(2)) were studied by a pump-probe interferometric technique. Laser photoionization was shown to increase both the refractive index and absorbance of the water. While the absorption dynamics were found to be in a good agreement with previous studies, the temporal behavior of the refractive index exhibited novel features. It was found that the always-positive refractive index contains distinct peaks at the beginning and end of the laser pulses. This behavior was attributed to the Kerr effect in water molecules and in wet/hydrated electrons produced by photoionization, respectively. (C) 2019 Optical Society of America

引用

页码：256 / 259

页数：4

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