Temperature Dependence and Screening Models in Quantum Cascade Structure

Rikard Nelander; Andreas Wacker

doi:10.1063/1.3226072

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arXiv · 0908.4159

Temperature Dependence and Screening Models in Quantum Cascade Structure

Rikard Nelander·Andreas Wacker

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Abstract

Different screening models in quantum cascade lasers are compared by calculating the contribution of intra-subband impurity scattering to the optical linewidth as a function of temperature. We find a strong impact of impurity scattering which is increasing substantially with temperature. A simple isotropic bulk screening model works well if the screening length is of the order or longer than the period length of the cascade structure.

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Rikard Nelander, Andreas Wacker. 2009-08-28. Temperature Dependence and Screening Models in Quantum Cascade Structure. https://doi.org/10.1063/1.3226072

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