  Single-photon detection with high efficiency, high timing resolution, low
dark counts and high photon detection-rates is crucial for a wide range of
optical measurements. Although efficient detectors have been reported before,
combining all performance parameters in a single device remains a challenge.
Here, we show a broadband NbTiN superconducting nanowire detector with an
efficiency exceeding 92%, over 150MHz photon detection-rate, a dark count-rate
below 130Hz, operated in a Gifford-McMahon cryostat. Furthermore, with careful
optimization of the detector design and readout electronics, we reach an
ultra-low system timing jitter of 14.80ps (13.95ps decoupled) while maintaining
high detection efficiencies.
