Researchers use a superconducting nanowire design for fast and precise photon counting. Researchers have developed a new detector that can precisely measure single photons at very high rates. The new device could help make high-speed quantum communication practical. Quantum communication uses li
describe and demonstrate their new detector for measuring the arrival times of photons, which they call PEACOQ detector.
“There is not currently another detector that can count single photons this quickly with the same timing resolution,” said Craiciu. “We know this detector will be useful for quantum communication, but we also hope that it could enable other applications that we haven’t considered.”Speeding up quantum communication transmission rates requires a detector on the receiving end that can make quick measurements and exhibits a short dead time so that it can contend with a high rate of arriving photons.
“When the detector measures a photon, it outputs an electric pulse, and the time-to-digital converter measures the arrival time of this electrical pulse very precisely, with a resolution below 100 picoseconds or 70 million times faster than a snap of the fingers,” said Craiciu. “We developed a new time-to-digital converter that can measure up to 128 channels at once with this timing resolution, which is important because our detector needs 32 channels.
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