Cooper, JD, Valavanis, A, Ikonic, Z et al. (2 more authors) (2010) Finite difference method for solving the Schrödinger equation with band nonparabolicity in mid-infrared quantum cascade lasers. Journal of Applied Physics, 108 (11). 113109 - 113109 . ISSN 0021-8979
Abstract
The nonparabolic Schrödinger equation for electrons in quantum cascade lasers (QCLs) is a cubic eigenvalue problem (EVP) which cannot be solved directly. While a method for linearizing this cubic EVP has been proposed in principle for quantum dots [ Hwang et al., Math. Comput. Modell., 40, 519 (2004) ] it was deemed too computationally expensive because of the three-dimensional geometry under consideration. We adapt this linearization approach to the one-dimensional geometry of QCLs, and arrive at a direct and exact solution to the cubic EVP. The method is then compared with the well established shooting method, and it is shown to be more accurate and reliable for calculating the bandstructure of mid-infrared QCLs.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | collaboration: eid: 113109 numpages: 5 keywords: eigenvalues and eigenfunctions; finite difference methods; quantum cascade lasers; Schrodinger equation |
Keywords: | eigenvalues and eigenfunctions, finite difference methods, quantum cascade lasers, Schrodinger equation |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Dec 2010 12:32 |
Last Modified: | 07 Jan 2017 17:48 |
Published Version: | http://link.aip.org/link/?JAP/108/113109/1 |
Status: | Published |
Publisher: | AIP |
Identification Number: | 10.1063/1.3512981 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:42712 |