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On the interdiffusion-based quantum cascade laser

Kocinac, S., Tomic, S., Ikonic, Z. and Milanovic, V. (2002) On the interdiffusion-based quantum cascade laser. IEEE Photonics Technology Letters, 14 (8). pp. 1067-1069. ISSN 1041-1135

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Design procedure for the active region of current pumped quantum cascade laser is proposed, so to achieve maximal gain. Starting with an arbitrary smooth potential, a family of isospectral Hamiltonians with predefined energy spectrum is generated using the inverse spectral theory. By varying the relevant control parameter the potential shape is varied, inducing changes in transition dipole moments and electron–phonon scattering times, and the optimal potential which gives the largest gain is thus found. For purpose of realization, a simple step quantum-well structure with just a few layers is then designed so that in the post-growth heating-induced layer interdiffusion, it will acquire a shape as close as possible to the optimal smooth potential

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2002 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: gain optimization, layer interdiffusion, quantum cascade lasers
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: Sherpa Assistant
Date Deposited: 10 Oct 2005
Last Modified: 13 Jun 2014 22:30
Published Version: http://dx.doi.org/10.1109/LPT.2002.1021971
Status: Published
Refereed: Yes
Identification Number: 10.1109/LPT.2002.1021971
URI: http://eprints.whiterose.ac.uk/id/eprint/717

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