Efficient single-photon emission via quantum-confined charge funneling to quantum dots.

ABSTRACT: Quantum light sources, particularly single-photon emitters (SPEs), are critical for quantum communications and computing. Among them, III-V semiconductor quantum dots (QDs) have demonstrated superior SPE metrics, including near-unity brightness, high photon purity, and indistinguishability, making them especially suitable for quantum applications. However, their overall quantum efficiency-determined by a product of the internal, excitation, and outcoupling efficiencies-remains limited, primarily due to low (typically below 0.1%) excitation efficiency. To mitigate the low efficiency under non-resonant pumping, here we realize liquid droplet etched GaAs QDs in a microscale 3D AlGaAs charge-carrier funnel. The funnel channels charge carriers to the QD and enhances the overall emission efficie

SUBMITTER: Park S 

PROVIDER: S-EPMC12727503 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature