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Optical multistability of exciton states in semiconductors

The nonlinear light transmission of semiconductors, in which the indirect exciton phototransition is realized, is studied. It is shown that the presence of two channels of dissipation of light wave energy of the indirect phototransition (the excitation of libration phonons) and exciton relaxation (the excitation of lattice phonons) -- leads to arising of optical multistable states in crystals. Investigations of polarization peculiarities of the dynamics of nonlinear processes with changing intensity of the input signal have been carried out.