Full-Field Terahertz Imaging at Kilohertz Frame Rates Using Atomic Vapor
Full-Field Terahertz Imaging at Kilohertz Frame Rates Using Atomic Vapor
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DOI：
10.1103/physrevx.10.011027
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发表时间：
2020-02-07
影响因子：
12.5
通讯作者：
Weatherill, Kevin J.
中科院分区：
文献类型：
--
作者：
Downes, Lucy A.;MacKellar, Andrew R.;Weatherill, Kevin J.
人们对在一系列成像应用中使用太赫兹（THz）辐射很感兴趣，但到目前为止，技术一直在努力实现必要的帧速率。在这里，我们展示了一个太赫兹成像系统的基础上，有效的太赫兹到原子蒸气中的光学转换，全场图像可以收集在100万美元的速度，使用传统的光学相机技术。对于0.55太赫兹场，我们展示了一个有效的1厘米（2）传感器，具有近衍射极限的空间分辨率和最小可检测功率为（190 +/- 30）fW s（-1/2）每（40 x 40）μ m（2）像素能够在3000帧每秒的视频捕获。这种速度和灵敏度的结合代表了THz成像技术的一个阶段性变化，并可能导致其在更广泛的工业环境中的应用。
There is much interest in employing terahertz (THz) radiation across a range of imaging applications, but so far, technologies have struggled to achieve the necessary frame rates. Here, we demonstrate a THz imaging system based upon efficient THz-to-optical conversion in atomic vapor, where full-field images can he collected at ultrahigh speeds using conventional optical camera technology. For a 0.55-THz field, we show an effective 1-cm(2) sensor with near diffraction-limited spatial resolution and a minimum detectable power of (190 +/- 30) fW s(-1/2) per (40 x 40) mu m(2) pixel capable of video capture at 3000 frames per second. This combination of speed and sensitivity represents a step change in the state of the art of THz imaging and will likely lead to its uptake in wider industrial settings.