Energy relaxation in IR laser excited Hg<sub>1-x</sub>Cd<sub>x</sub>Te

Storebø, Asta Katrine; Brudevoll, T.; Olsen, Øystein; Norum, Ole Christian; Breivik, M

doi:10.1088/1742-6596/193/1/012024

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2010

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“…Some of our initial results with the improved model were briefly presented in a conference paper 38 in conjunction with Monte Carlo simulation of electronic relaxation processes. Herein we give a more complete analysis of the main effects that arise when all the latest updates of the model are included.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Numerical Modeling of IR-Laser-Irradiated HgCdTe

Storebø

Brudevoll

Stenersen

2010

Journal of Elec Materi

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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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Section: Simulation Results and Discussionmentioning

confidence: 99%