  A single quantum dot deterministically coupled to a photonic crystal
environment constitutes an indispensable elementary unit to both generate and
manipulate single-photons in next-generation quantum photonic circuits. To
date, the scaling of the number of these quantum nodes on a fully-integrated
chip has been prevented by the use of optical pumping strategies that require a
bulky off-chip laser along with the lack of methods to control the energies of
nano-cavities and emitters. Here, we concurrently overcome these limitations by
demonstrating electrical injection of single excitonic lines within a
nano-electro-mechanically tuneable photonic crystal cavity. When an
electrically-driven dot line is brought into resonance with a photonic crystal
mode, its emission rate is enhanced. Anti-bunching experiments reveal the
quantum nature of these on-demand sources emitting in the telecom range. These
results represent an important step forward in the realization of integrated
quantum optics experiments featuring multiple electrically-triggered
Purcell-enhanced single-photon sources embedded in a reconfigurable
semiconductor architecture.
