Launch of the World's First Hybrid Chip That Combines Electronics

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In a major breakthrough for quantum technology, scientists from Boston University, UC Berkeley, and Northwestern University have developed the first chip that simultaneously integrates three components: electronics, photonics, and quantum. The study, published in the journal Nature Electronics, describes a system that combines a quantum light source with a stable electronic circuit, all manufactured using a standard 45-nanometer semiconductor process.

Miniature quantum light factory

Similar to how electronic chips run on electricity or optical communications systems use lasers, future quantum technologies will need a steady supply of photons. The team created arrays of 'quantum light factories' on silicon chips, each measuring less than 1mm².

'The most exciting thing is that we have embedded the control system directly on the chip – stabilizing the quantum process in real time,' said Anirudh Ramesh, a graduate student at Northwestern University and a member of the research team. 'This is an important step towards developing scalable quantum systems.'

Breakthrough stability solution

The ring microresonators—the core components of quantum light sources—are inherently temperature-sensitive. The Boston University team addressed this challenge by integrating a photodiode inside the resonator to monitor alignment with the input laser, as well as a heater and logic circuit that continuously adjusts the output.

'The key is to push the photonic design to meet the demanding requirements of quantum optics within the constraints of commercial CMOS platforms,' explains Imbert Wang, a Boston University graduate student in charge of photonic device design.

Great application potential

The chip is manufactured using a 45nm CMOS process - the result of a collaboration between Boston University, UC Berkeley, GlobalFoundries and startup Ayar Labs. This technology is not only used for optical interconnects in AI and supercomputers, but now paves the way for complex quantum photonic systems on a scalable silicon platform, building complex quantum photonic systems entirely on CMOS chips.

As quantum photonics systems advance, such chips could become the foundation for technologies ranging from secure communications networks to advanced sensors, and eventually quantum computing infrastructure.