Numerous applications at the photon-starved regime require a free-space coupling singlephoton 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 um in diameter, a DCR of ~5 kcps, and a low time jitter of ~171 ps, operated at near-infrared of 1550 nm. As a demonstration, we applied the detector to a single-pixel galvanometer scanning system and successfully reconstructed object information in depth and intensity using a time-correlated photon counting technology.
@article{arxiv.2402.02311,
title = {A free-space coupled, large-active-area superconducting microstrip single-photon detector for photon-counting time-of-flight imaging},
author = {Yu-Ze Wang and Wei-Jun Zhang and Xing-Yu Zhang and Guang-Zhao Xu and Jia-Min Xiong and Zhi-Gang Chen and Yi-Yu Hong and Xiao-Yu Liu and Pu-Sheng Yuan and Ling Wu and Zhen Wang and Li-Xing You},
journal= {arXiv preprint arXiv:2402.02311},
year = {2024}
}