Disorder-induced interference in exciton decay dynamics

Summary form only given.Coherent nonlinear spectroscopy is particularly well suited to the study of relaxation in these systems because of the well understood spectroscopic footprints that are associated with specific interactions and systems. Experiments are performed on a narrow (42 /spl Aring/) single MBE grown GaAs quantum well with 250-/spl Aring/ Al/sub 0.3/Ga/sub 0.7/As barriers. Based on photoluminescence (PL) and phased-locked epitaxy (PLE) measurements, excitons in this system are localized in potentials corresponding to average monolayer thickness of either 15 or 16 monolayers.