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Characteristic features of the steady-state transmission (reflection) by a thin semiconductor film in the exciton part of the spectrum

The steady-state transmission (reflection) of laser radiation by a thin semiconductor film was investigated taking into account the exciton — photon and elastic exciton — exciton interactions. Under certain conditions the resultant dependences of the transmission by a thin film on the amplitude of the incident radiation and on the detuning from a resonance exhibit a hysteresis, which can be explained by a shift of the exciton level when the exciton density is increased.