Scalable quantum light factory chip unveiled

Built by an interdisciplinary team, the chip’s on-board feedback ensures stable photon generation, key for communication, sensing, and computing applications.
quantum photonic chip, CMOS foundry, microring resonators, photon pairs, on-chip feedback, scalable quantum systems, quantum communication, quantum sensing, commercial semiconductor, interdisciplinary research

A milestone in quantum technology was achieved with the world’s first silicon chip that integrates quantum light sources and stabilising control electronics, fabricated using a standard commercial 45 nm semiconductor process. The compact chip, roughly 1 mm square, generates correlated photon pairs, key for secure communication, sensing, and computing, while built-in feedback circuits maintain performance under variable conditions.

Engineers from Northwestern University, Boston University and UC Berkeley collaborated to embed microring resonators, photodiodes, on-chip heaters and control logic, packaging them into a single, scalable system. The result is the first demonstration of a “quantum light factory” chip produced in mass-production foundries, bypassing bulky lab setups and paving the path for widespread deployment.

Researchers believe this advancement marks a crucial step forward. The ability to manufacture quantum photonic systems at scale could lead to secure quantum networks, advanced sensing platforms, and eventually photonic quantum computers. By proving the integration of quantum and classical electronics on shared silicon technologies is possible, the team has opened a new frontier in quantum engineering.

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