Abstract
Two polariton scattering in resonance with giant two-photon excitation of excitonic molecule in CuCl has been measured in various scattering configurations with using single-beam and two-beam excitation methods. Several scattering lines are found, the peak energies of which depend strongly not only on the direction of observation but also on the geometrical configuration of two excitation laser beams. Dependence of the peak energy, line width and polarization of these scattering lines upon the incident energy and the excitation power has been investigated in details, from which the non-linear effect on the polariton dispersion associated with the giant two-photon absorption is found.
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