Image theory for plasmon-modified luminescence near nanospheres

Zhe Zhang, Derrick Lim, Rodolfo Diaz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


We present a quasi-static model of the electromagnetic interaction between dipolar emitting molecule and a Plasmon-metal nano-sphere. Based on the image theory of dielectric sphere, we model the Plasmon nano-spheres by off-centered dipole images. The retardation effect is taken into account by electrodynamical modifications on spherical polarizability and dipole radiation field. The modifications of the radiative rate, total decay rate and the quantum yield for the molecules are derived. The image model indicates the strong distance dependence of the enhancement on both radiative and total decay rates. The comparison with the exact electrodynamical model and other simplified models indicate that the off-center image provide accurate predictions on radiative and total decay rates, even in close distances.

Original languageEnglish (US)
Title of host publicationColloidal Nanocrystals for Biomedical Applications VIII
StatePublished - May 30 2013
EventColloidal Nanocrystals for Biomedical Applications VIII - San Francisco, CA, United States
Duration: Feb 2 2013Feb 4 2013

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


OtherColloidal Nanocrystals for Biomedical Applications VIII
Country/TerritoryUnited States
CitySan Francisco, CA


  • Plasmon sphere
  • fluorescence enhancement
  • image theory

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging


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