Numerical Modeling of IR-Laser-Irradiated HgCdTe
Source: Journal of Electronic Materials, Volume 39, Number 10, October 2010 , pp. 2220-2232(13)
Abstract:We study laser-induced nonequilibrium processes in intrinsic Hg1−x 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/cm2 to 20 MW/cm2 at four selected wavelengths from 3.8 m to 10.6 m 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-valence-band 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.
Document Type: Research Article
Affiliations: 1: FFI (Norwegian Defence Research Establishment), P.O. Box 25, 2027, Kjeller, Norway, Email: email@example.com 2: FFI (Norwegian Defence Research Establishment), P.O. Box 25, 2027, Kjeller, Norway
Publication date: October 1, 2010