Two-well quantum cascade laser optimization by non-equilibrium Green's function modelling
arXiv:1709.09563 · doi:10.1063/1.5004640
Abstract
We present a two-quantum well THz intersubband laser operating up to 192 K. The structure has been optimized with a non-equilibrium Green's function model. The result of this optimization was confirmed experimentally by growing, processing and measuring a number of proposed designs. At high temperature (T>200 K), the simulations indicate that lasing fails due to a combination of electron-electron scattering, thermal backfilling, and, most importantly, re-absorption coming from broadened states.
Main article: 5 pages, 5 figures