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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 1.4ps 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 180μm 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.

中文翻译:

具有皮秒时间分辨率的非视距成像

非视距 (NLOS) 成像可实现拐角处的监控,并有望用于各种应用。瞬态 NLOS 成像的分辨率仅限于厘米级,主要受探测器的时间分辨率限制。在这里,我们构建了一个具有高时间分辨率的上转换单光子探测器1.4ps以及每秒 5 个计数 (cps) 的低噪声计数率。值得注意的是,检测器在室温下工作,近红外波长。使用该探测器,我们展示了高分辨率和低噪声 NLOS 成像。我们的系统可以提供180μ轴向分辨率和 2 mm 横向分辨率,比之前的实验提高了 1 个数量级以上。这些结果为相关应用中的高分辨率 NLOS 成像技术开辟了道路。
更新日期:2021-07-28
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