PHYSICAL REVIEW B
covering condensed matter and materials physics
Cavity-enhanced two-photon interference using remote quantum dot sources
DOI:https://doi.org/10.1103/PhysRevB.92.161302
Quantum dots in cavities have been shown to be very bright sources of indistinguishable single photons. Yet the quantum interference between two such bright quantum dot sources, a critical step for photon-based quantum computation, still needs to be investigated. We have reported on such a measurement, taking advantage of a deterministic fabrication of the QD-cavity devices. We show that cavity quantum electrodynamics can efficiently improve the quantum interference between remote quantum dot sources: Poorly indistinguishable photons can still interfere with good contrast with high quality photons emitted by a source in the strong Purcell regime. Our measurements and calculations show that cavity quantum electrodynamics is a powerful tool for interconnecting several quantum dot devices.