Laser controlled molecular switches and transistors

J. Lehmann, S. Camalet, S. Kohler, and P. Hänggi

Chem. Phys. Lett. 368, 282 (2003)

Preprint: arXiv:physics/0205060

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We investigate the possibility of optical current control through single molecules which are weakly coupled to leads. A master equation approach for the transport through a molecule is combined with a Floquet theory for the time-dependent molecule. This yields an efficient numerical approach to the evaluation of the current through time-dependent nano-structures in the presence of a finite external voltage. We propose tunable optical current switching in two- and three-terminal molecular electronic devices driven by properly adjusted laser fields, i.e., a novel class of molecular transistors.

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