We study laser-induced nonequilibrium processes in intrinsic Hg 1Àx Cd x Te with alloy fractions x = 0.2 and x = 0.28. Excitations of nanosecond to microsecond duration with an intensity of 2 MW/cm 2 to 20 MW/cm 2 at four selected wavelengths from 3.8 lm to 10.6 lm are considered. Recent publications indicate significantly longer Auger lifetimes than those previously found in the literature. We discuss the consequences of this and introduce improved descriptions of Auger recombination, impact ionization, and inter-valenceband absorption. We observe increased carrier concentrations and reduced carrier excess temperatures. This, in turn, leads to significant changes in photonic absorption, particularly one-photon absorption across the band gap and inter-valence-band absorption.

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