Modeling of SPAD avalanche breakdown probability and jitter tail with field lines

A new methodology to accurately simulate the Photon Detection Efficiency and Jitter tail of SPAD devices is presented. This method first relies on use electric field lines mimic carriers’ trajectories. model for impact ionization avalanche probability then used obtained avalanche, coupled with optical absorption, PDE extracted. Finally, an advection–diffusion drift diffusion carriers within device, which leads timing jitter due transport time from photogeneration spot region. The results numerically are compared extensive series measurements show a good agreement wide variety device designs.