Abstract
Variations in the optical properties of pure water induced by a femtosecond laser (wavelength 800 nm, intensity $ \sim {10^{12}}\;{\rm W}/{{\rm 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.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Javier Hernandez-Rueda and Dries van Oosten
Opt. Lett. 44(7) 1856-1859 (2019)
Vitali V. Kononenko, Viktor M. Gololobov, Evgeny V. Zavedeev, and Vitaly I. Konov
J. Opt. Soc. Am. B 37(9) 2615-2619 (2020)
Yuri E. Geints, Andrey M. Kabanov, Gennadii G. Matvienko, Victor K. Oshlakov, Alexander A. Zemlyanov, Sergey S. Golik, and Oleg A. Bukin
Opt. Lett. 35(16) 2717-2719 (2010)