Non-Line-of-Sight Imaging with Picosecond Temporal Resolution,Physical Review Letters

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Non-Line-of-Sight Imaging with Picosecond Temporal Resolution
Physical Review Letters ( IF 8.1 ) Pub Date : 2021-07-28 , DOI: 10.1103/physrevlett.127.053602
Bin Wang _{1,

2} , Ming-Yang Zheng ₂ , Jin-Jian Han _{1,

3,

4} , Xin Huang _{1,

3,

4} , Xiu-Ping Xie ₂ , Feihu Xu _{1,

3,

4,

5} , Qiang Zhang _{1,

3,

4,

5} , Jian-Wei Pan _{1,

3,

4}

Affiliation

Non-line-of-sight (NLOS) imaging enables monitoring around corners and is promising for diverse applications. The resolution of transient NLOS imaging is limited to a centimeter scale, mainly by the temporal resolution of the detectors. Here, we construct an up-conversion single-photon detector with a high temporal resolution of

\sim 1.4 ps

and a low noise count rate of 5 counts per second (cps). Notably, the detector operates at room temperature, near-infrared wavelength. Using this detector, we demonstrate high-resolution and low-noise NLOS imaging. Our system can provide a

180 μ m

axial resolution and a 2 mm lateral resolution, which is more than 1 order of magnitude better than that in previous experiments. These results open avenues for high-resolution NLOS imaging techniques in relevant applications.

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