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Envelope function description of quantum cascade laser electronic states

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Author(s): Michal WASIAK | Maciej BUGAJSKI | Wlodzimierz NAKWASKI

Journal: Optica Applicata
ISSN 0078-5466

Volume: 35;
Issue: 3;
Start page: 651;
Date: 2005;
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Keywords: quantum cascade lasers | electronic structure

ABSTRACT
In this paper, we present a natural method of finding wavefunctions and energy levels in quantum cascade lasers. The envelope function approximation has been successfully used for modelling electronic structure in conventional semiconductor lasers. Although calculations in the case of polarized potential are more complicated than in non-polarized wells, it is still possible to obtain quickly reliable results.
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