Abstract

We have investigated laser-induced breakdown (LIB) in water by measuring stimulated Raman scattering (SRS) induced in the early stage of the LIB phenomenon. The SRS is emitted before the breakdown plasma continuum emission becomes dominant and lasts about 80 picoseconds. The time-resolved spectra of the SRS indicate that ice VII structure is formed partially and inhomogeneously in the focal volume of the exciting beam on a picosecond time scale. The mechanism of the SRS inducement is also discussed.

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