SELF-CONSISTENT FLOQUET STATES FOR PERIODICALLY DRIVEN QUANTUM-WELLS

We have developed a nonperturbative method to compute the dynamics of electrons in quantum wells driven by oscillating electric fields. Floquet theory enables us to compute, in the local-density approximation, solutions of the Schrodinger equation for zero temperature which are self-consistent and for which the density is periodic in time. The method is demonstrated by computing harmonic generation from a tilted square well, which agrees with perturbation theory, and second-harmonic emission from an Al0.3Ga0.7As heterojunction, which agrees with recent experiments of Bewley et al.