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 proportional (Omega delta)^-1, where Omega is the phonon frequency and delta is the pulse duration.
© 2005 Optical Society of America
Jared K. Wahlstrand, Roberto Merlin, Xiaoqin Li, Steven T. Cundiff, and Oscar E. Martinez, "Impulsive stimulated Raman scattering: comparison between phase-sensitive and spectrally filtered techniques," Opt. Lett. 30, 926-928 (2005)