Inter-pixel Crosstalk in Auger-Suppressed Dense Infrared Detectors

We simulated the optical and electrical response of a planar HgCdTe 5 x 5 pixel miniarray with 5 μm-wide square pixels, illuminated by narrow Gaussian beams. The compositional grading of the HgCdTe absorber required particular techniques to obtain combined three-dimensional, realistic full-wave electromagnetic and electrical simulations. The simulation results suggest that, by avoiding quasi-neutral regions in the detector's absorber through majority carriers depletion, not only the Auger contribution to dark current results suppressed, but also the inter-pixel crosstalk due to the diffusion of photogenerated carriers is significantly reduced.