Temperature Dependence and Screening Models in Quantum Cascade Structure
arXiv:0908.4159 · doi:10.1063/1.3226072
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.
7 pages, 9 figures