  Single-photon sources with near-unity efficiency and indistinguishability
play a major role in the development of quantum technologies. However,
on-demand excitation of the emitter imposes substantial limitations to the
source performance. Here, we show that coherent two-color pumping allows for
population inversion arbitrarily close to unity in bulk quantum dots thanks to
a decoupling effect between the emitter and its phonon bath. Driving a
micropillar single-photon source with this scheme, we calculate very high
photon emission into the cavity mode (0.95 photons per pulse) together with
excellent indistinguishability (0.975) in a realistic configuration, thereby
removing the limitations imposed by the excitation scheme on single-photon
source engineering.
