4H-SiC Single Photon Detector for Detection of Individual Airborne Particles in Light Induced Fluorscence Systems

SiC: An excellent platform for single-photon detection and emission

“…The single-photon avalanche photodiode arrays have been achieved by Prof. Lu's group [3,4]. Nowadays, the single-photon avalanche photodiodes can be used to detect airborne particles with an SPDE of 30% under 280 nm, which is comparable with photomultiplier tubes (PMT) [5], which profit from the outstanding avalanche characteristics of SiC based on its high-quality crystal and have the potential to be applied in UV lidar and cooperate with infrared one for the unmanned vehicle. It is probably not well known that the first blue lightemitting diode (LED) was fabricated based on SiC epitaxial wafer [6], as displayed in Figure 1, though the external quantum efficiency of the blue LED is lower than 0.03% due to the indirect band gap of SiC.…”