Molecular Vibrations in Liquids: Direct Measurement of the Molecular Dephasing Time; Determination of the Shape of Picosecond Light Pulses

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Abstract
Molecular vibrations are coherently excited by an intense light pulse of duration tp. The rise and decay of the vibrational amplitude is measured with delayed pulses of the same time dependence. The molecular dephasing time τ is obtained when τ≳tp, while the shape of the light pulse is found for τ≪tp.

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