Abstract

Numerous applications at the photon-starved regime require a free-space coupling single-photon detector with a large active area, low dark count rate (DCR), and superior time resolutions. Here, we developed a superconducting microstrip single-photon detector (SMSPD), with a large active area of 260 µm in diameter, a DCR of ${\sim}{5}\;{\rm kcps}$, and a low time jitter of ${\sim}{171}\;{\rm ps}$, operated at a near-infrared of 1550 nm and a temperature of ${\sim}{2.0}\;{\rm K}$. As a demonstration, we applied the detector to a single-pixel galvanometer scanning system and successfully reconstructed the object information in depth and intensity using a time-correlated photon counting technology.

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