Researchers at the University of Maryland and NIST have developed a highly sensitive single-photon avalanche diode (SPAD) detection system that can detect photons well before a readout gate is applied, increasing its detection duty cycle. This new mode of operation, similar to charge-coupled devices (CCD), allows single-photon signals to be accumulated within the detector and read out later, extending the sensitive period.
The invention, led by Dr. Alessandro Restelli of the Joint Quantum Institute, has potential applications in LIDAR and quantum cryptography. The team, which also includes researchers from Caltech’s Jet Propulsion Laboratory, has nominated the SPAD system for the 2014 Invention of the Year Award.
Keywords: SPAD, detection duty cycle, Joint Quantum Institute, photodetection, LIDAR, quantum cryptography, NIST, photon detection, single-photon signals
