BFE in the MIRI detector model simulation. Left column: distribution of the electrostatic potential, ϕ, across the five-by-five simulation pixel grid. Middle column: location on the pixel geometric grid where each produced photoelectron landed. Neighboring pixels are given alternating colors. This probes the effective pixel collecting area change due to the de-biasing. Right column: photoelectron generation in infrared-active layer and photoelectron path tracking. The light pink region is the un-depleted region, which grows as the pixel accumulates more charge. Going from the top to the bottom row, the model is injected with 1, 10, 25, 45, and 75 times N = 45 000 tracers.