Near infrared single photon avalanche diode oriented toward quantum and LiDAR applications

Near-infrared (NIR) single photon detectors (SPDs) have been used in several applications, such as optical time domain reflectometry (OTDR), light detection and ranging (LiDAR) and quantum key distribution (QKD). SPDs are demanded to exhibit high single photon efficiency (SPDE), low dark count rate (DCR), low jitter, and low afterpulsing probability. Among all of available SPDs, single photon avalanche diode (SPAD) receives much attention for a long while due to its advantages of solid-state material, compactness, ease-of use, and effective cost. In this talk, I will present our recent work on the design, fabrication and the characterization of single photon avalanche diodes (SPADs). A novel SPAD structure has been proposed and its several figure of merits are acquired and discussed. Further result on photon number resolving will also be included.