Exciton- and light-induced current in molecular nanojunctions

B. D. Fainberg, P. Hanggi, S. Kohler, A. Nitzan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We consider exciton- and light-induced current in molecular nanojunctions. Using a model comprising a two two-level sites bridge connecting free electron reservoirs we show that the exciton coupling between the sites of the molecular bridge can markedly effect the source-drain current through a molecular junction. In some cases when excited and unexcited states of the sites are coupled differently to the leads, the contribution from electron-hole excitations can exceed the Landauer elastic current and dominate the observed conduction. We have proposed an optical control method using chirped pulses for enhancing charge transfer in unbiased junctions where the bridging molecule is characterized by a strong charge-transfer transition.

Original languageEnglish
Title of host publicationTransport and Optical Properties Of Nanomaterials - Proceedings of the International Conference, ICTOPON - 2009
Pages78-86
Number of pages9
DOIs
StatePublished - 2009
Event1st International Conference on Transport And Optical Properties Of Nanomaterials, ICTOPON 2009 - Allahabad, India
Duration: 5 Jan 20098 Jan 2009

Publication series

NameAIP Conference Proceedings
Volume1147
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference1st International Conference on Transport And Optical Properties Of Nanomaterials, ICTOPON 2009
Country/TerritoryIndia
CityAllahabad
Period5/01/098/01/09

Keywords

  • Excitons
  • Light-induced current
  • Molecular nanojunctions

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