We present a dictionary that defines terms and metrics relevant to the characterization of single-photon detectors and sources, with the goal of promoting better understanding and communication, and providing a useful reference for the quantum and single-photon communities. Clear definitions can accelerate technology development and device interoperability. The resulting common language also allows commercial devices to be compared directly and helps clarify to users what performance they can expect.
Contact: singlephotondictionary [at] nist.gov (singlephotondictionary[at]nist[dot]gov)