Onset of ice VII phase of liquid water: Role of filamentation in stimulated Raman scattering
Onset of ice VII phase of liquid water: Role of filamentation in stimulated Raman scattering
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Date
2015-01-01
Authors
Kumar, V. Rakesh
Kiran, P. Prem
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Abstract
Energy dependent evolution of Stokes and anti-Stokes lines of ice VII via forward stimulated Raman scattering (FSRS) during propagation of a 30 ps laser pulse through liquid water, confirming structural change over GPa pressure range, is studied. Self-focusing of the intense laser pulses is observed to ionize the medium generating free electrons that dominate the evolution of SRS signals. The confinement of plasma-generated free electrons by filamentation is observed to enhance the signature Raman modes of ice VII by reducing the SRS threshold.
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Optics Letters. v.40(12)