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Resonant laser excitation of molecular wires
Author(s) -
Kohler Sigmund,
Lehmann Jörg,
Camalet Sébastien,
Hänggi Peter
Publication year - 2003
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1560/aubm-9vqy-1wmp-meu5
Subject(s) - chemistry , floquet theory , excitation , laser , hamiltonian (control theory) , electron , molecule , atomic physics , current (fluid) , formalism (music) , molecular wire , molecular physics , quantum mechanics , physics , mathematical optimization , musical , mathematics , organic chemistry , nonlinear system , visual arts , thermodynamics , art
We investigate the influence of external laser excitations on the average current through bridged molecules. For the computation of the current, we use a numerically very efficient formalism that is based on the Floquet solutions of the time‐dependent molecule Hamiltonian. It is found that the current as a function of the laser frequency exhibits characteristic peaks originating from resonant excitations of electrons to bridge levels that are unoccupied in the absence of radiation. The electric current through the molecule can exhibit a drastic enhancement by several orders of magnitude.