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 Scopus citations


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 (US)
Title of host publicationLiquid Crystals XI
StatePublished - 2007
EventLiquid Crystals XI - San Diego, CA, United States
Duration: Aug 26 2007Aug 28 2007

Publication series

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


OtherLiquid Crystals XI
Country/TerritoryUnited States
CitySan Diego, CA

All Science Journal Classification (ASJC) codes

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


Dive into the research topics of 'Tunable refractive index materials with metallic nano-spheres dispersed in organic liquids'. Together they form a unique fingerprint.

Cite this