Effective medium models for metal-dielectric composites: An analysis based on the spectral density theory

Jordi Sancho-Parramon (Lead / Corresponding author), Salvador Bosch, Amin Abdolvand, Alexander Podlipensky, Gerhard Seifert, Heinrich Graene

Research output: Contribution to journalConference article

11 Citations (Scopus)

Abstract

We study different effective medium theories for describing the optical behaviour of composites consisting of spherical metallic inclusions embedded in a dielectric matrix. The analysis is performed according to the Bergman spectral density theory. This theory establishes that any effective medium model has an integral representation in terms of a function (the spectral density) that depends on the geometry of the two-phase mixture and is independent of the optical constants of the composing materials. We review classical effective medium theories (Maxwell-Garnett and Bruggeman models) according to their spectral density. Furthermore, numerical simulations based in recent works allow studying the influence of different geometric parameters in the spectral density and compare the results with the classical theories.

Original languageEnglish
Article number596320
Pages (from-to)556-566
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5963
DOIs
Publication statusPublished - 5 Oct 2005
EventAdvances in Optical Thin Films II - Jena, Germany
Duration: 13 Sep 200515 Sep 2005

Keywords

  • Effective medium
  • Metal-dielectric composites
  • Spectral density theory
  • Surface plasmon resonance

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