Controlling currents through molecular wires

S. Kohler, J. Lehmann, and P. Hänggi

Superlatt. Microstruct. 34, 419 (2004)

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We investigate the possibility of controlling by external laser fields both the current through molecular wires and the corresponding noise properties. It is found that a proper off-resonant driving field reduces the coherent transport across the molecule resulting in a strong current suppression. The relative level of transport noise, being characterized by a Fano factor, exhibits characteristic maxima and minima near regimes of current suppression. In a three-terminal configuration, the field allows to steer the current selectively towards one terminal.

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