Simulation for cross talk in IR detectors by Lior Shkedy

This program deals with the problem of hole diffusion in Focal plane array detectors.

There is an array of diodes which are connected on their n sides, which are also exposed to the incident light. The light is being absorbed on the n side of the diode and generating a pair of electron and hole. The hole is performing a field free 3D random walk until it recombines with another electron or it reaches the junction. When they reach the junction then they contribute to the detector current.

In the case that they are being absorbed by a neighbouring junction they contribute to the current at the other diode and this is cross talk between diodes. It means that information that was supposed to get to one diode reached the other diode.

The holes' motion can be calculated using the ambypolar eq. using difficult boundary conditions, but using the simulation simplfies the calculations.

The program enables one to change the boundary contion and use more complex conditions.

Personal details:

name: Lior Shkedy

phone at the office: 04-9902648

e-mail: yshkedy@ort.org.il

Thesis: InSb FPA detector - non uniformity correction

suppervised by: Prof. Lipson

Back to the Computational Physics Class index page