Green function for fluorescence from spherical particles located on a substrate

Gorden W. Videen; Steven C. Hill; J. David Pendleton

doi:10.1117/12.279241

26 September 1997 Green function for fluorescence from spherical particles located on a substrate

Gorden W. Videen, Steven C. Hill, J. David Pendleton

Proceedings Volume 3141, Scattering and Surface Roughness; (1997) https://doi.org/10.1117/12.279241
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Fluorescence or Raman emission can be used in characterizing particles inside or near a surface, e.g., a biological cell or spore on a filter, or a contaminant particle on a silicon wafer. Here we model the emission from a sphere on a surface. The internal fields in a sphere on a surface are known for plane-wave excitation. These fields induce dipole moments in molecules in the sphere. These oscillating dipoles are the sources of the incident radiation at the shifted frequency. The Green function for emission is found by using the reciprocity theorem for Green functions along with the internal fields generated by a plane wave at the shifted frequency. Reciprocity provides a simple method for obtaining the far fields for systems for which the near/internal fields are known for plane-wave excitation.

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Gorden W. Videen, Steven C. Hill, and J. David Pendleton "Green function for fluorescence from spherical particles located on a substrate", Proc. SPIE 3141, Scattering and Surface Roughness, (26 September 1997); https://doi.org/10.1117/12.279241

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