Fig. 1. An atomic quantum light source in silicon photonics.

a Device and measurement schematic. (i) A G center is created inside a silicon photonic waveguide via ion implantation. (ii) Silicon waveguide cross section. G center transition dipole $\overrightarrow{d}$ is along 〈110〉. Laser excitation (orange) of the G center results in single-photon emission into the waveguide (red) which is collected using a lensed fiber. b Scanning electron micrograph of the photonic waveguide near the broadband Bragg reflector. c PL image of the waveguide shows bright emission from an isolated G center.