Abstract

Quantum interference processes are investigated in the diagonal and nondiagonal excitonic emission spectra of quantum well structures coupled by single infrared fields polarized along their growth directions and resonant with the first-to-second-conduction-subband transitions. This investigation predicts generation of the Autler - Townes doublet in the emission spectrum of the coupled ground exciton state (diagonal transition) and development of a dynamic emission hole followed by a dark line in that of the higher coupled exciton states (nondiagonal transition). The characteristic limits determining these processes are determined and reported experimental results are explained successfully.

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