Ultrahigh-Speed Color Imaging with Single-Pixel Detectors at Low Light Level

To date, ghost imaging (in which correlation of photons is used to locate an object and enhance its picture) has struggled with low imaging speed. The authors construct an LED array that displays light patterns at a modulation rate as high as 100 MHz, which enables imaging at more than 1.4 million frames per second, with the capability of color imaging. They further extend this method to high-speed imaging in low light by introducing multiple single-photon detectors. This technique offers a major step for the application of ghost imaging.