Crosstalk in InSb Detector Arrays

optoex17.in : Crosstalk in InSb Detector Arrays

Requires: Device 3D/Luminous 3D
Minimum Versions: Atlas 5.28.1.R

This example demonstrates:

  • Crosstalk as well as Quantum efficiency as a function of InSb detector design parameters.

Crosstalk is one of the main parameters that critically affect the resolution of detector arrays. Electrical crosstalk is attributed to carriers that are photogenerated under one detector, diffusing and being collected by another detector in the array. As the photodiode size and the pitch (distance between photodiodes) of the detector array get smaller, there is a greater probability of crosstalk influencing system performance since the probability of a generated carrier being collected by a neighboring junction increases. Atlas will be used to study the crosstalk and also the quantum efficiency of a 5 x 5 InSb detector arrays in the three dimensional domain.

The structure consists of InSb photodiodes fabricated on top of the InSb buffer layer. The p+ regions were doped with acceptor concentration of 1 x 1019 cm-3 and the buffer layer was doped with donor concentration of 1 x 1015 cm-3. The contacts on these photodiodes are ohmic and they are named as anode 1, anode 2, ... anode 25 in the simulation. The cathode is formed on top of the buffer layer surrounding the photodiodes.

In this simulation, a multi-spectral source will be used and the source will be a black-body radiator operating at a temperature of 2000 Kelvin. The power.file parameter in the BEAM statement will be used for that purpose.

A parametrized input deck optoex17.in was created with 4 parameters which are the size of the pixel the pitch between pixel the InSb epilayer thickness and InSb buffer layer thikness

The variation of these parameters are made using the DBInternal capability of DeckBuild. The file name is optoex17_doe.in . See DOE: Design of Experimenst Example section of DeckBuild for more information on how to use DBInternal .

To load and run this example, select the Load button in DeckBuild. This will copy the input file and any support files to your current working directory. optoex17.in will be loaded by default. You should load optoex17_doe.in for design parameters variation using DBInternal. Once loaded into DeckBuild, select the run button to execute the example.