Rectification of laser-induced electronic transport through molecules

Details Rectification of laser-induced electronic transport through molecules Rectification of laser-induced electronic transport through molecules

2002-08-21

arxiv.org/abs/cond-mat/0208404v1

J. Chem. Phys. 118, 3283 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, 10 figures, REVTeX4

Scientific paper

10.1063/1.1536639

We study the influence of laser radiation on the electron transport through a molecular wire weakly coupled to two leads. In the absence of a generalized parity symmetry, the molecule rectifies the laser induced current, resulting in directed electron transport without any applied voltage. We consider two generic ways of dynamical symmetry breaking: mixing of different harmonics of the laser field and molecules consisting of asymmetric groups. For the evaluation of the nonlinear current, a numerically efficient formalism is derived which is based upon the Floquet solutions of the driven molecule. This permits a treatment in the non-adiabatic regime and beyond linear response.

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