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 articlepeer-review

    15 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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