Temperature Dependence and Screening Models in Quantum Cascade Structure

Details Temperature Dependence and Screening Models in Quantum Cascade Structure Temperature Dependence and Screening Models in Quantum Cascade Structure

2009-08-28

arxiv.org/abs/0908.4159v1

J. Appl. Phys. 106, 063115 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 9 figures

Scientific paper

10.1063/1.3226072

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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