Abstract
A new method for measuring vibrational lifetimes in the solid state is demonstrated in a dilute mixed molecular crystal. Using a picosecond light pulse at ω 1 and simultaneous crossed pulses at ω 2, a vibrational population grating at ω 1 – ω 2 is prepared. The decay of this grating is followed by measuring at variable delay the Bragg-angle diffraction of a probe pulse, resonant with an optical transition.
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