title: Supersymmetric optimization of second-harmonic generation in mid-infrared quantum cascade lasers.
abstract: We describe a procedure to optimize mid-infrared quantum cascade lasers with respect to the resonant second-order optical susceptibility, based on supersymmetric quantum mechanics. Realization of the optimized potential can be obtained by composition grading of ternary alloys, such as in InGaAs/AlInAs-based structures. The approach yields designs not only with strongly enhanced predicted nonlinear conversion efficiencies, but also with significantly improved modal gain compared with demonstrated devices.
authors.forename: Jing
authors.initials: J
authors.lastname: Bai
authors.forename: David S
authors.initials: DS
authors.lastname: Citrin