Abstract

Expressions for the enhancement of the far-field scattering cross section of a luminescent or Raman- active compound contained within a multilayered nanosphere are derived, where the active compound resides between an outer metallic shell and a metallic core. The quasi-static approximation is assumed for silver and gold particles using a Lorentz–Drude model of the dielectric function. An attempt has also been made to account for the effect of electron scattering from the boundaries of the shell on the enhancement calculation.

© 2009 Optical Society of America

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