Nonlinear transmission of supershort laser pulses by thin semiconductor films

Abstract

Peculiarities of nonlinear nonstationary transmission (reflection) of supershort laser pulse by a thin semiconductor film, depending on the intensities, envelope shapes and widths were investigated taking into account the processes of exciton–photon interaction, optical exciton–biexciton conversion and two–photon biexciton excitation from the ground state of the crystal. For the short pulses of the rectangular shape we have predicted the nonstationary regimes of the total reflection of the incident pulse, of the total bleaching, of the transformation of a short pulse into the train of supershort pulses, of the generation of solitary supershort pulse, the width of which is of some orders less, than the width of the incident pulse.