Femtosecond time-resolved measurements of optic phonon dephasing by impulsive stimulated raman scattering in α-perylene crystal from 20 to 300 K

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Abstract

Excitation and detection of coherent optic phonons by impulsive stimulated Raman scattering (ISRS) is reported. The technique permits femtosecond time-resolved observations of optic phonon oscillations and dephasing. Decay rates of librational and translational optic phonons in α-perylene crystals have been measured in the temperature range 20–30 K.

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