Tunable refractive index materials with metallic nano-spheres dispersed in organic liquids

Andres Diaz, Shoichi Kubo, Yan Tang, Justin Liou, Theresa S. Mayer, Iam Choon Khoo, Thomas E. Mallouk

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    2 Citations (Scopus)

    Abstract

    Metamaterials are of substantial current interest because they may exhibit unusual and/or configurable optical responses. We studied the optical properties of gold and silver nanoparticles dispersed in different organic liquids in the visible to near-IR. Calculation of the refractive indices of metallic nanospheres or metallic-coated silica spheres in liquid crystals show the possibility of tuning and varying the refractive index by reorientation of the liquid crystal molecules. Measurements of the refractive indices of gold nanoparticles in dodecane were experimentally studied by using spectroscopic ellipsometry and a reasonable agreement with the theoretical results based on Mie scattering was obtained. Finally, the effect of gold and silver nanospheres on the nonlinear absorption properties of an organic liquid (L34, a 4,4′-dialkyl phenyleneethynylene) was studied. The results suggest that metallic nanoparticles dispersed in a host organic fluids can be good materials for fabrication of low and tunable index materials in the visible to near-IR wavelength range, and for the enhancement of the nonlinear absorption of liquids used in switching applications.

    Original languageEnglish
    Title of host publicationLiquid Crystals XI
    DOIs
    Publication statusPublished - 2007 Dec 1
    EventLiquid Crystals XI - San Diego, CA, United States
    Duration: 2007 Aug 262007 Aug 28

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume6654
    ISSN (Print)0277-786X

    Other

    OtherLiquid Crystals XI
    CountryUnited States
    CitySan Diego, CA
    Period07/8/2607/8/28

    Keywords

    • Gold
    • Liquid crystals
    • Low-index materials
    • Metamaterials
    • Nanoparticles
    • Nonlinear optics
    • Silver

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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