Abstract

We report all-UV coherent anti-Stokes Raman scattering (CARS) in calcite with 250280nm pump, Stokes, probe, and anti-Stokes light. UV CARS efficiency is 7× higher than for comparable scattering in the visible, 480540nm. Time-resolved UV CARS reveals lengthening of the dephasing time of 1086cm1 CO32 internal vibrations from 4to7ps with increasing vibrational excitation, consistent with a phonon depletion model.

© 2006 Optical Society of America

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