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Quantum control in quantum wells

1998; American Physical Society; Volume: 57; Issue: 15 Linguagem: Inglês

10.1103/physrevb.57.9024

1095-3795

Jeffrey L. Krause, D. H. Reitze, G. D. Sanders, Alex V. Kuznetsov, Christopher J. Stanton,

Terahertz technology and applications

We present calculations of quantum control of wave packet motion and THz emission in an asymmetric double-quantum-well structure. A genetic algorithm is used to search for the laser pulse that best drives an electronic wave packet to a desired target, or goal. The targets considered in this work include maximizing the overlap of an electronic wave packet with a given distribution at a specific time, and maximizing the induced THz emission from the quantum well. We also show that, assuming a fixed laser pulse, the parameters of the quantum well can be optimized to produce a desired outcome. Our results indicate that simple laser pulses are sufficient to exert control over the dynamics of charged carriers in engineered semiconductor heterostructures.