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Proceedings Paper

Green function for fluorescence from spherical particles located on a substrate
Author(s): Gorden W. Videen; Steven C. Hill; J. David Pendleton
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Paper 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.

Paper Details

Date Published: 26 September 1997
PDF: 8 pages
Proc. SPIE 3141, Scattering and Surface Roughness, (26 September 1997); doi: 10.1117/12.279241
Show Author Affiliations
Gorden W. Videen, Army Research Lab. (United States)
Steven C. Hill, Army Research Lab. (United States)
J. David Pendleton, Army Research Lab. (United States)


Published in SPIE Proceedings Vol. 3141:
Scattering and Surface Roughness
Zu-Han Gu; Alexei A. Maradudin, Editor(s)

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