Dec. 08, 2025 –
A team from Boston University, UC Berkeley, and Northwestern University has created the first chip that integrates quantum light sources with electronic control circuits in a standard 45 nm CMOS process. Published in Nature Electronics, the work marks a major step toward mass-produced quantum photonic systems.
The 1 × 1 mm chip integrates microring resonators, photodiodes, heaters, and control logic to generate and stabilise correlated photon pairs. The on-chip feedback system keeps each resonator aligned with the input laser, removing the need for bulky external stabilisation equipment.