Photoneutralization of charges in GaAs quantum dot based entangled photon emitters

Semiconductor-based emitters of pairwise photonic entanglement are a promising constituent quantum technologies. They known for the ability to generate discrete states on-demand with low multiphoton emission, near-unity fidelity, and high single photon indistinguishability. However, dots typically suffer from luminescence blinking, lowering efficiency source hampering their scalable application in networks. In this paper, we investigate adjust intermittence neutral exciton emission GaAs/AlGaAs dot under two-photon resonant excitation biexciton. We spectral optical response an additional wavelength tunable gate laser, revealing blinking caused by intrinsic Coulomb blockade due charge capture processes. Our finding demonstrates that quenching can be actively suppressed controlling balance free electrons holes vicinity thereby significantly increasing 30%.