Abstract
Two-phonon resonant, coherent Raman scattering (four-photon degenerate coherent scattering) via excitonic molecules has been studied as a function of intensity of incident light in CuCl and CuBr. Observed line-shaped of coherent scattering spectra broadens as excitation intensity is raised. This broadening is found to be closely correlated with that of the two-photon absorption. These results are qualitatively explained by taking account of the excitation intensity-dependence of χ (3), but cannot be explained by the autoinization model.
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