Kinetics of nonsteady-state energy transfer in a medium with an amplitude-phase pattern of the nonlinear response

A solution to coupled wave equations, which describes the kinetics of nonsteady-state energy transfer between two light pulses in a bulk medium with a local nonlinear response, has been obtained in the preset pump-field approximation. It is shown that in a general case the energy transfer is an alternating function of the time delay between pulses, which is dominated by the relative magnitude of the amplitude and phase components of the nonlinear response. The solution obtained was fitted to the results of model experiments on Si. Agreement is reached with the fitting parameters determined from Drude theory for plasma-induced variation of dielectric permittivity. Fiz. Tverd. Tela (St. Petersburg) 39, 1980–1984 (November 1997)