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Numerical simulation of crosstalk in reduced pitch HgCdTe photon-trapping structure pixel arrays
Jonathan Schuster1, Enrico Bellotti
1Electrical and Computer Engineering Department, Boston University, 8 Saint Mary’s Street, Boston, MA 02215, USA.
Abstract:
We have investigated crosstalk in HgCdTe photovoltaic pixel arrays employing a photon trapping (PT) structure realized with a periodic array of pillars intended to provide broadband operation. We have found that, compared to non-PT pixel arrays with similar geometry, the array employing the PT structure has a slightly higher optical crosstalk. However, when the total crosstalk is evaluated, the presence of the PT region drastically reduces the total crosstalk; making the use of the PT structure not only useful to obtain broadband operation, but also desirable for reducing crosstalk in small pitch detector arrays.
