Abstract
Schottky barrier infrared detectors are often characterized by photoresponse measurements. This work models how the photoresponse is influenced by an energy dependent mean free path of hot hole-cold electron collisions and different amounts of energy loss in collisions. The response has been calculated and presented as curves in Fowler plots. The slope and curvature of those vary with the energy dependence of the free path. A standard procedure for determining the barrier height from Fowler plots has been applied and the results have been compared to the known input value to the model. The difference depends upon the energy dependence of the free path. It has been found that the overall influence of the energy dependence of the free path on the calculated response depends on whether thermalization of photoexcited carriers is assumed to occur primarily through phonon scattering or through hole-electron scattering. The photoresponse is more affected by energy variations in the hole-electron scattering length when carriers mainly lose energy in hole-electron collisions.
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