Dipole quantum beats of dynamically interacting excitons

Summary form only given. We use spectral interferometry and temporal gating techniques to investigate the time-integrated quantum beats (TI-QBs) involving the light hole (lh) and heavy hole (hh) excitons in GaAs-AlGaAs quantum wells in a geometry that is sensitive both to the nonradiative Raman coherence and to the radiative dipole coherence associated with the dynamic interactions between hh and lh excitons. We then use the polarization of the incident light and the selection rules for the hh and lh transitions to isolate the contributions of the dynamic coupling between the excitons.