title: Optimization study of third harmonic generation in quantum cascade lasers.
abstract: A systematic optimization study of quantum cascade lasers with integrated nonlinearity for third-harmonic generation is performed. To model current transport the Pauli master equation is solved using a Monte Carlo approach. A multi-objective particle swarm optimization algorithm is applied to obtain the Pareto front. Our theoretical analysis indicates an optimized structure with five orders of magnitude increase in the generated third-harmonic power with respect to the reference design. This striking performance comes with a low threshold current density of about 1.6 kA/cm2 and is attributed to double resonant phonon scattering assisted extraction and injection scheme of the laser.
authors.forename: Ali
authors.initials: A
authors.lastname: Mojibpour
authors.forename: Mahdi
authors.initials: M
authors.lastname: Pourfath
authors.forename: Hans
authors.initials: H
authors.lastname: Kosina