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Electron-phonon relaxation rates and optical gain in a quantum cascade laser in a magnetic field

Radovanovic, J., Milanovic, V., Ikonic, Z., Indjin, D. and Harrison, P. (2005) Electron-phonon relaxation rates and optical gain in a quantum cascade laser in a magnetic field. Journal of Applied Physics, 97 (10). 103109 -(5 pages). ISSN 1089-7550

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Abstract

We present a model for calculating the optical gain in a midinfrared GaAs/AlGaAs quantum cascade laser in a magnetic field, based on solving the set of rate equations that describe the carrier density in each level, accounting for the optical- and acoustic-phonon scattering processes. The confinement caused by the magnetic field strongly modifies the lifetimes of electrons in the excited state and results in pronounced oscillations of the optical gain as a function of the field. Numerical results are presented for the structure designed to emit at lambda~11.4 µm, with the magnetic field varying in the range of 10–60 T. The effects of band nonparabolicity are also included. © 2005 American Institute of Physics.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2005 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.
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: 08 Feb 2013 17:03
Published Version: http://dx.doi.org/10.1063/1.1904706
Status: Published
Publisher: American Institute of Physics
Refereed: Yes
Identification Number: 10.1063/1.1904706
URI: http://eprints.whiterose.ac.uk/id/eprint/1693

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