Graphene-Based Josephson-Junction Single-Photon Detector

Detecting single photons is essential for numerous technologies, from quantum computing to observations of the faintest objects in the universe. The authors propose a detector based on graphene's dual abilities to absorb light across a huge range of wavelengths, and to experience an extreme rise in electronic temperature by absorbing just one photon. Simulations show that these properties allow for high detection efficiency, when the graphene is coupled to superconductors in a Josephson junction at cryogenic temperatures.