Gajić, A, Radovanović, J, Milanović, V et al. (2 more authors) (2014) GaInAs/AlInAs quantum cascade laser design based on optimized second harmonic generation. Physica Scripta, T162. ISSN 0281-1847
Abstract
In this work, we present an innovative procedure for the design and optimization of GaInAs/AlInAs quantum cascade laser (QCL) structures based on the use of the genetic algorithm. The purpose of the algorithm is to determine the set of design parameters that would enable the maximization of the second order nonlinear susceptibility, thus facilitating significant optical nonlinearities to take place. In our optimization model, we start from the existing design in which the active region consists of two coupled InGaAs quantum wells separated by an AlInAs barrier, and the active region levels form double resonant nonlinear cascades. Upon obtaining the optimized structure and evaluating its energies and wave functions, the output characteristics are calculated by applying the full self-consistent rate equation modeling of the electron transport in a periodic QCL structure. The results of the calculations predict a noticeable improvement of targeted properties of the optimized design, while at the same time the original design calculations show excellent agreement with experimental results. The described procedure is applicable to various active region designs and can be used for other wavelength ranges.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | Genetic algorithm; optimization; quantum cascade lasers; second harmonic generation; target function |
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: | 16 Feb 2015 15:04 |
Last Modified: | 04 Nov 2016 06:22 |
Published Version: | http://dx.doi.org/10.1088/0031-8949/2014/T162/0140... |
Status: | Published |
Publisher: | Royal Swedish Academy of Sciences |
Identification Number: | 10.1088/0031-8949/2014/T162/014009 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:82904 |