It is demonstrated that fully microscopic many-body models are required for a correct description of the dominant carrier loss-processes in semiconductor lasers, spontaneous emission and Auger recombination, and that they are able to quantitatively predict these losses. The density dependence of the losses assumed in semiempirical aproaches, J=AN+BN2+CN3, is shown to break down already near transparency. For the spontaneous emission it is shown to decrease from quadratic to linear (BN), Auger rates are shown to increase only quadratically (CN2) or even less.

© 2005 Optical Society of America

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