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Gain optimization in optically pumped AlGaAs unipolar quantum-well lasers

Tomic, S., Milanovic, V. and Ikonic, Z. (2001) Gain optimization in optically pumped AlGaAs unipolar quantum-well lasers. IEEE Journal of Quantum Electronics, 37 (10). pp. 1337-1344. ISSN 0018-9197

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Abstract

A method is described for the optimized design of quantum-well (QW) structures, in respect to maximizing the stimulated gain in optically pumped intersubband lasers. It relies on applying supersymmetric quantum mechanics (SUSYQM) to an initial Hamiltonian, in order to both map one bound state below the spectral range of the initial Hamiltonian, and to generate a parameter-controlled family of isospectral Hamiltonians with the desired energy spectrum. By varying the control parameter, one changes the potential shape and, thus, the values of dipole matrix elements and electron-phonon scattering matrix elements. The use of this procedure is demonstrated by designing smoothly graded and stepwise-constant Al/(x)Ga/(1-x). As ternary alloy QWs, with the self-consistent potential taken into account. Finally, the possibility of employing layer interdiffusion to get optimal smooth potentials is discussed

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2001 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: lLayer interdiffusion, quantum-well lasers, supersymmetric quantum mechanics
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Microwaves and Photonics (Leeds)
Depositing User: Sherpa Assistant
Date Deposited: 28 Mar 2006
Last Modified: 08 Feb 2013 17:02
Published Version: http://dx.doi.org/10.1109/3.952546
Status: Published
Refereed: Yes
Identification Number: 10.1109/3.952546
URI: http://eprints.whiterose.ac.uk/id/eprint/716

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