Abstract
Light scattering and absorption by spherical particles is extended to aggregates
of spheres with arbitrary shape and size. We applied the theory of
Gérardy and Ausloos [Phys. Rev. B 25,
4204–4229 (1082)] to compute the total extinction loss spectra
of several aggregates of nanometer-sized silver spheres from the near IR to the
near UV. Silver was best suited to provide quantitative comparison with
experiments concerning the scattering and absorption in the visible spectral
region. Additional resonant extinction was obtained besides the resonant
extinction of the single silver sphere. The spectra were discussed in detail to
give general results that are independent of the particle material.
© 1993 Optical Society of America
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