Simulation of laser beam induced current for HgCdTe photodiodes with leakage current

We report on 2D numerical simulations of laser beam induced current (LBIC) for HgCdTe photovoltaic detector. The effect of junction leakage current on the LBIC signal is investigated, and different leakage paths caused by different reasons in HgCdTe photodiode arrays are taken into account in the simulation. The simulation results are in good agreement with the experiment data. Simulation results suggest that the LBIC can be used to determine the existence of the junction leakage current and investigate the original of the junction leakage current.