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Full-field terahertz imaging at kilohertz frame-rates using atomic vapor
Physical Review X ( IF 11.6 ) Pub Date : 
Lucy A. Downes, Andrew R. MacKellar, Daniel J. Whiting, Cyril Bourgenot, Charles S. Adams, and Kevin J. Weatherill

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 framerates. Here we demonstrate a THz imaging system based upon efficient THz-to-optical conversion in atomic vapour, where full-field images can be collected at ultra-high speeds using conventional optical camera technology. For a 0.55~THz field we show an effective 1,cm2 sensor with near diffraction-limited spatial resolution and a minimum detectable power of 190±30,fWs1/2, per 40×40,m 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.

中文翻译:

使用原子蒸气以千赫兹帧频进行全场太赫兹成像

在整个成像应用中都采用太赫兹(THz)辐射引起了人们的极大兴趣,但是到目前为止,技术一直在努力实现必要的帧速率。在这里,我们演示了一种基于原子蒸气中有效THz到光学转换的THz成像系统,其中可以使用传统的光学相机技术以超高速收集全场图像。对于0.55〜THz的场,我们显示出有效的1,cm2 具有接近衍射极限的空间分辨率和最小可检测功率的传感器 190±30,fWs-1个/240×40,m像素,能够以每秒3000帧的速度捕获视频。速度和灵敏度的这种结合代表了太赫兹成像技术的最新发展,并有可能导致其在更广泛的工业环境中被采用。
更新日期:2020-01-07
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