Abstract:Time-domain coherent Raman spectroscopy technique with excellent time (<120 fs) and equivalent spectral resolutions (up to ∼0.1 cm −1 ) has been applied to selectively measure ultrafast decay rates of optical phonons in technologically important wide-bandgap materials. The decays of intrinsic vibrations have been traced in time within multiple orders and phonon decay times varied broadly within 0.45−1.7 ps range. Primary decay routes via third-and fourth-order parametric phonon interactions have been analyzed … Show more
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