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Aspects of the internal physics of InGaAs/InAlAs quantum cascade lasers

McTavish, J., Indjin, D. and Harrison, P. (2006) Aspects of the internal physics of InGaAs/InAlAs quantum cascade lasers. Journal of Applied Physics, 99 (11). 114505-(6 pages). ISSN 1089-7550

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We report on the results of our simulations of an InGaAs/InAlAs midinfrared quantum cascade laser (QCL) designed to operate in continuous wave mode at room temperature [Beck et al., Science 295, 301 (2002)]. Our physical model of the device consists of a self-consistent solution of the subband population rate equations and accounts for all electron-longitudinal-optical phonon and electron-electron scattering rates, as well as an evaluation of the temperature of the nonequilibrium electron distribution. We also consider the role of the doping density and its influence on the electron dynamics. We found that the temperature of the nonequilibrium electron distribution differed significantly from the lattice temperature and that this temperature increased with applied electric field and current density, with coupling constants somewhat larger than analogous GaAs based midinfrared QCLs. Our simulations also reveal physical processes of the device that are not apparent from the experimental measurements, such as the role of electron-electron scattering. © 2006 American Institute of Physics

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2006 American Institute of Physics. Reproduced in accordance with the publisher's self-archiving policy. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Microwaves and Photonics (Leeds)
Depositing User: Repository Officer
Date Deposited: 02 Nov 2006
Last Modified: 06 Jun 2014 07:33
Published Version: http://dx.doi.org/10.1063/1.2201252
Status: Published
Publisher: American Institute of Physics
Refereed: Yes
Identification Number: 10.1063/1.2201252
URI: http://eprints.whiterose.ac.uk/id/eprint/1697

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