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Applied Physics B

, Volume 84, Issue 1–2, pp 211–217 | Cite as

Modification of single molecule fluorescence by a scanning probe

  • S. Kühn
  • V. SandoghdarEmail author
Article

Abstract

We examine the optical near-field interaction between different types of scanning tips and single oriented fluorescent molecules. We demonstrate the influence of a tip on the excitation intensity as well as on the integrated fluorescence signal, the excited state lifetime, and the angular emission of single molecules. By using a standard model describing the radiation of an oscillating dipole close to a nanosphere or a flat interface, we interpret our observations and describe some central criteria for obtaining fluorescence enhancement or quenching.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Laboratorium für Physikalische ChemieETH ZürichZürichSwitzerland

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