Fig. 2From: Dominant Influence of Interface Roughness Scattering on the Performance of GaN Terahertz Quantum Cascade LasersSimulated maximum optical gain vs frequency and current-electric field simulations for different scattering process. a Simulated optical gain vs frequency taking account of different scattering process. b Current-electric field simulations of the GaN THz QCL taking account different scattering parameters. Temperature is set at 10 KBack to article page