Abstract

Impulsive stimulated Raman scattering is used to generate and control coherent phonons and other low-frequency modes. In transparent materials, pump–probe experiments are usually performed by spectrally resolving the probe beam and measuring the spectral shift as a function of pump–probe time delay. By measuring the optical phase of the probe pulse as a function of time delay, we find that the phonon signal can be increased by a factor (Ωδ)1, where Ω is the phonon frequency and δ is the pulse duration.

© 2005 Optical Society of America

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