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Full-field terahertz imaging at kilohertz frame-rates using atomic vapor
Physical Review X ( IF 12.211 ) 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,fWs−1/2, 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.
更新日期:2020-01-07

 

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