We describe quantum information schemes involving photon polarization and the spin of a single electron trapped
in a self-assembled quantum dot. Such schemes are based on spin-selective reflection in the weak-coupling regime
of cavity quantum electrodynamics. We discuss their practical implementation in oxide-apertured micropillar
cavities. We introduce a technique, based on the creation of small surface defects by means of a focused intense
laser beam, to permanently tune the optical properties of the microcavity without damaging the cavity quality.
This technique allows low-temperature polarization-selective tuning of the frequencies of the cavity modes and
the quantum dot optical transitions.
We report on recent progress towards single photon sources based on quantum dot and quantum post nanostructures
which are manipulated using surface acoustic waves. For this concept acoustic charge conveyance in a quantum well is
used to spatially separate electron and hole pairs and transport these in the plane of the quantum well. When conveyed to
the location of a quantum dot or quantum post these carriers are sequentially captured into the confined levels. Their
radiative decays gives rise to the emission of a train of single photons. Three different approaches using (i) straininduced
and (ii) self-assembled quantum dots, and (iii) self-assembled quantum posts are discussed and their application
potential is discussed. First devices and initial experiments towards the realization of such an acoustically driven single
photon source are presented and remote acoustically triggered injection into few individual emitters is demonstrated.