Quantum detector precisely measures single photons at very high rates with 10 GHz clock frequency
"performance-enhanced array for counting optical quanta (PEACOQ).space-to-ground quantum communications... timing resolution below 100 ps,... 13 µm across, with 32 superconducting nanowires each 7.5 nm thick from niobium nitride on silicon chip -458°F superconducting enables single-photon count rates above 1 giga-count/ sec... short nanowire decreases geometric jitter... 80% efficiency rate... shifts from blue to green as you move it under light due to dielectric stack on top of nanowires“
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