High-performance quantum light sources based on III–V quantum dots are key components for quantum networks, but most rely on bulky optical pumping, which limits their practicality. Here, we demonstrate electrically driven bright single-photon emitters based on InAs single quantum dots deterministically embedded in InP nanowire diodes. By designing a core–shell p-i-n structure, the quantum dot emission is coupled to the Fabry–Perot mode, resulting in Purcell-enhanced single-photon emission with a purity of g (2) (0) = 0.21 and a brightness up to one million counts per second. The device exhibits long-term stability, maintaining both a stable photon count rate and emission wavelength over an hour under continuous current injection. Furthermore, by engineering the quantum dot size, the emission wavelength can be extended to the telecommunication band, providing a pathway toward scalable, fiber-compatible, electrically driven single-photon sources for quantum communication.
Huang et al. (Wed,) studied this question.