  Acousto-electric charge conveyance induced by a surface acoustic wave is
employed to dissociate photogenerated excitons. Over macroscopic distances,
both electrons and holes are injected \emph{sequentially} into a remotely
positioned, isolated and high-quality quantum emitter, a self-assembled quantum
post. This process is found to be highly efficient and to exhibit improved
stability at high acoustic powers when compared to direct optical pumping at
the position of the quantum post. These characteristics are attributed to the
wide matrix quantum well in which charge conveyance occurs and to the larger
number of carriers available for injection in the remote configuration,
respectively. The emission of such pumped quantum posts is dominated by
recombination of neutral excitons and fully directional when the propagation
direction of the SAW and the position of the quantum post are reversed.
