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Laser‐assisted conductance of molecular wires: Two‐photon contributions
Author(s) -
Urdaneta I.,
Keller A.,
Atabek O.,
Mujica V.
Publication year - 2003
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.10842
Subject(s) - conductance , laser , photon , electrode , absorption (acoustics) , chemistry , atomic physics , two photon absorption , molecular physics , quantum , physics , condensed matter physics , optics , quantum mechanics
We extend to second order in the field intensity a previously obtained first‐order expression for the conductance of a tight‐binding molecular wire, bridging two electrodes, illuminated by a weak laser. The higher‐order term brings in corrections due to two‐photon processes that, for low intensities and strong molecule–electrode contacts, are several orders of magnitude smaller than the first‐order leading terms. For other ranges of parameters, the second‐order correction may be significant mostly due to processes involving the absorption or emission of two photons. © 2003 Wiley Periodicals, Inc. Int J Quantum Chem, 2004