Scalable performance in solid-state single-photon sources

Understand

The desiderata for an ideal photon source are high brightness, high single-photon purity, and high indistinguishability.

• Defining brightness at the first collection lens, these properties have been simultaneously demonstrated with solid-state sources, however absolute source efficiencies remain close to the 1% level, and indistinguishability only demonstrated for photons emitted consecutively on the few nanosecond scale.
• Here we employ deterministic quantum dot-micropillar devices to demonstrate solid-state single-photon sources with scalable performance.
• In one device, an absolute brightness at the output of a single-mode fibre of 14% and purities of 97.1-99.0% are demonstrated.