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Energy deposition dynamics of femtosecond pulses in water

: Minardi, Stefano; Milián, Carles Ricardo; Majus, Donatas; Gopal, Amrutha; Tamošauskas, Gintaras; Pertsch, Thomas; Dubietis, Audrius


Applied Physics Letters 105 (2014), No.22, Art. 224104, 5 pp.
ISSN: 0003-6951
ISSN: 1077-3118
Journal Article
Fraunhofer IOF ()

We exploit inverse Raman scattering and solvated electron absorption to perform a quantitative characterization of the energy loss and ionization dynamics in water with tightly focused near-infrared femtosecond pulses. A comparison between experimental data and numerical simulations suggests that the ionization energy of water is 8 eV, rather than the commonly used value of 6.5 eV. We also introduce an equation for the Raman gain valid for ultra-short pulses that validates our experimental procedure.