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Thermal modeling of terahertz quantum-cascade lasers: comparison of optical waveguides

Evans, C.A., Indjin, D., Ikonic, Z., Harrison, P., Vitiello, M.S., Spagnolo, V. and Scamarcio, G. (2008) Thermal modeling of terahertz quantum-cascade lasers: comparison of optical waveguides. IEEE Journal of Quantum Electronics, 44 (7). pp. 680-685. ISSN 0018-9197

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We compare a set of experimental lattice temperature profiles measured in a surface-emitting terahertz (THz) quantum-cascade laser (QCL) with the results of a 2-D anisotropic heat diffusion model. We evaluate the temperature dependence of the cross-plane thermal conductivity (kappaperp) of the active region which is known to be strongly anisotropic due to its superlattice-like nature. Knowledge of kappaperp and its temperature dependence is crucial in order to improve the temperature performance of THz QCLs and this has been used to investigate the longitudinal lattice temperature distribution of the active region and to compare the thermal properties of metal-metal and semi-insulating surface-plasmon THz optical waveguides using a 3-D anisotropic heat diffusion model.

Item Type: Article
Copyright, Publisher and Additional Information: © Copyright 2008 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.
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: 13 Mar 2009 18:39
Last Modified: 07 Jun 2014 23:03
Published Version: http://dx.doi.org/10.1109/JQE.2008.922327
Status: Published
Publisher: IEEE
Refereed: Yes
Identification Number: 10.1109/JQE.2008.922327
URI: http://eprints.whiterose.ac.uk/id/eprint/7976

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