High sensitivity avalanche photodetectors are able to measure light at the single photon level. Single photon measurements are usually performed using single pixel SPAD detectors - our collaborators at Edinburgh University have developed state of the art SPAD arrays that are capable of delivering images of single photons. We are using these cameras to push the limits of imaging technology. Examples are quantum imaging but also detecting objects that are hidden from view, e.g. by a wall or a dense, scattering medium. Learn more from our video.
This research is funded through the Quantum Technology Hub for Quantum Imaging, QuantIC and through the EPSRC project, UltraImage.