Interfacing scalable photonic platforms: solid-state based multi-photon interference in a reconfigurable glass chip

C Antón, JC Loredo, G Coppola, H Ollivier… - Optica, 2019 - opg.optica.org
Scaling-up optical quantum technologies requires a combination of highly efficient multi-
photon sources and integrated waveguide components. Here, we interface these scalable
platforms, demonstrating high-rate three-photon interference with a quantum dot based multi-
photon source and a reconfigurable photonic chip on glass. We actively demultiplex the
temporal train of single photons obtained from a quantum emitter to generate a 3.8× 10^ 3
s^− 1three-photon source, which is then sent to the input of a tunable tritter circuit …
Scaling-up optical quantum technologies requires a combination of highly efficient multi-photon sources and integrated waveguide components. Here, we interface these scalable platforms, demonstrating high-rate three-photon interference with a quantum dot based multi-photon source and a reconfigurable photonic chip on glass. We actively demultiplex the temporal train of single photons obtained from a quantum emitter to generate a 3.8×10^3  s^−1three-photon source, which is then sent to the input of a tunable tritter circuit, demonstrating the on-chip quantum interference of three indistinguishable single photons. We show via pseudo number-resolving photon detection characterizing the output distribution that this first combination of scalable sources and reconfigurable photonic circuits compares favorably in performance with respect to previous implementations. Our detailed loss-budget shows that merging solid-state multi-photon sources and reconfigurable photonic chips could allow 10-photon experiments on chip at ∼40  s^−1 rate in a foreseeable future.
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