Monte Carlo simulation of terahertz quantum cascade lasers: The influence of the modelling of carrier-carrier scattering

A theoretical investigation of electron-electron scattering in quantum cascade lasers is presented. The devices are studied by means of an ensemble Monte Carlo simulation that includes all relevant scattering mechanisms. The energy levels and wave functions are determined by a self-consistent resolu...

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Bibliographic Details
Published in:Journal of computational electronics 2006-07, Vol.5 (2-3), p.103-107
Main Authors: Bonno, O., Thobel, J.-L., Dessenne, F.
Format: Article
Language:English
Subjects:
Design optimization
Energy levels
Engineering Sciences
Modelling
Monte Carlo simulation
Poisson equation
Population inversion
Quantum cascade lasers
Scattering
Wave functions
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Summary:A theoretical investigation of electron-electron scattering in quantum cascade lasers is presented. The devices are studied by means of an ensemble Monte Carlo simulation that includes all relevant scattering mechanisms. The energy levels and wave functions are determined by a self-consistent resolution of the Schrödinger and Poisson equations. The influence of the modelling of carrier-carrier scattering is discussed on the example of a resonant-phonon structure operating at 3.4 THz. To demonstrate the usefulness of such a model for optimization purpose, an alternative design operating at a lower frequency is proposed. Our model predicts that a significant population inversion can be achieved at about 1 THz.
ISSN:1569-8025
1572-8137
DOI:10.1007/s10825-006-8827-0