Abstract
Photodetectors (PD’s) exhibit significant nonlinear behavior when the incident optical power density is high.1–3 Numerical techniques have been used4 to analyze PD responses; however, the results contradict what is experimentally observed.1,2 This is due in part to the assumption4 that the main nonlinearity stems from a potential drop due to loading of the external circuit. However, with large photogenerated carrier densities, carrier flow leads to a large opposing space-charge field, which is shown here to collapse the applied field.
© 1993 Optical Society of America
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