Quasi-two-dimensional exciton in ZnSe/ZnMgSSe single quantum well
نویسندگان
چکیده
We have studied the quasi-two-dimensional exciton in ZnSe/ZnxMg12xSySe12y ~x50.85, y50.21! single quantum wells ~SQWs! by photoluminescence and photoluminescence excitation spectroscopy. Self-consistent calculations of the peak energies for a series of SQWs give the conduction band discontinuity DEc50.40DEg and the binding energy of the n51 heavy-hole exciton Eb~hh1!522.1 meV for an 8 nm well width. We believe that the binding energy of the n51 heavy-hole exciton is smaller than the LO phonon energy our samples resulting in a very large exciton-phonon interaction strength observed through the broadening of the exciton resonance with temperature. © 1995 American Institute of Physics.
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