The features of light reflection from the interface of a semi-infinite nonlinear crystal upon two-photon excitation of biexcitons

The features of light reflection from the interface of a semi-infinite semiconductor are studied upon two-pulse, two-photon excitation of biexcitons from the crystal ground state. It is shown that the reflectivity is a complex multistable function of the amplitudes of the fields of incident pulses. The appearence of solitary closed domains or horn-shaped structures is predicted.