Indistinguishable photons from an artificial atom in silicon photonics

Silicon is the ideal material for building electronic and photonic circuits at scale. Integrated quantum technologies in silicon offer a promising path to scaling by leveraging advanced complementary metal-oxide-semiconductor (CMOS) integration capabilities. However, the lack of deterministic quantum light sources, photon-photon gates, or long-range spin-spin interactions in current approaches poses a major challenge to scalability. In this talk, we will present results on a new type of indistinguishable photon source in silicon photonics based on an artificial atom. We show that a G center in a silicon waveguide can source high-purity telecom-band single photons. We perform high-resolution spectroscopy and time-delayed two-photon interference to demonstrate the indistinguishability of single photons emitted from a G center in a silicon waveguide. Our results show that artificial atoms in silicon photonics can produce highly coherent photons suitable for photonic quantum computation and communication protocols.