Optimizing free carrier absorption measurements for power devices by physically rigorous simulation

Abstract

The carrier distribution in the interior of power devices can be determined from free carrier absorption measurements. In this work, a physically rigorous simulation of the entire measurement process is performed to investigate the effects which arise from the wave propagation of the probing beam and the sample preparation. Quantitative results for optimization of the optical set-up and the sample geometries which minimize the unavoidable experimental errors are presented.