Non-Line-of-Sight Imaging with Picosecond Temporal Resolution

Bin Wang; Ming-Yang Zheng; Jin-Jian Han; Xin Huang; Xiu-Ping Xie; Feihu Xu; Qiang Zhang; Jian-Wei Pan

doi:10.1103/PhysRevLett.127.053602

Non-Line-of-Sight Imaging with Picosecond Temporal Resolution

Phys Rev Lett. 2021 Jul 30;127(5):053602. doi: 10.1103/PhysRevLett.127.053602.

Authors

Bin Wang^{1

2}, Ming-Yang Zheng², Jin-Jian Han^{1

3

4}, Xin Huang^{1

3

4}, Xiu-Ping Xie², Feihu Xu^{1

3

4

5}, Qiang Zhang^{1

3

4

5}, Jian-Wei Pan^{1

3

4}

Affiliations

¹ Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China.
² Jinan Institute of Quantum Technology, Jinan 250101, China.
³ Shanghai Branch, CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.
⁴ Shanghai Research Center for Quantum Sciences, Shanghai 201315, China.
⁵ Key Laboratory of Space Active Opto-electronics Technology, Chinese Academy of Sciences, Shanghai 200083, China.

PMID: 34397248
DOI: 10.1103/PhysRevLett.127.053602

Abstract

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 ∼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 μm 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.