World's smallest quantum light detector on a silicon chip

Researchers have made an important breakthrough in scaling quantum technology by integrating the world's tiniest quantum light detector onto a silicon chip.

Now, for the first time, University of Bristol academics have demonstrated the integration of a quantum light detector -- smaller than a human hair -- onto a silicon chip, moving us one step closer to the age of quantum technologies using light. In pursuit of this goal, researchers at the University of Bristol have demonstrated a type of quantum light detector that is implemented on a chip with a circuit that occupies 80 micrometers by 220 micrometers.

"These types of detectors are called homodyne detectors, and they pop up everywhere in applications across quantum optics" explains Professor Jonathan Matthews, who led the research and is Director of the Quantum Engineering Technology Labs.

Professor Matthews added:"We built the detector with a commercially accessible foundry in order to make its applications more accessible. While we are incredibly excited by the implications across a range of quantum technology, it is critical that we as a community continue to tackle the challenge of scalable fabrication of quantum technology. Without demonstrating truly scalable fabrication of quantum hardware, the impact and benefits of quantum technology will be delayed and limited.

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Researchers develop world's smallest quantum light detector on a silicon chipResearchers at the University of Bristol have made an important breakthrough in scaling quantum technology by integrating the world's tiniest quantum light detector onto a silicon chip. The paper, 'A Bi-CMOS electronic photonic integrated circuit quantum light detector,' was published in Science Advances.
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