A phonon scattering assisted injection and extraction based terahertz quantum cascade laser E Dupont et al. Journal of Applied Physics 111 (7), 073111 (2012)
Nonequilibrium Green's Function Model for Simulation of Quantum Cascade Laser Devices Under Operating Conditions Andreas Wacker, Martin Lindskog and David Winge, IEEE Journal of selected topics in quantum electonics 99, 1 (2013)