Metamaterials

Nano-dispersed liquid crystal with tunable negative-zero-positive refractive indices

Research output: Contribution to specialist publicationArticle

1 Citation (Scopus)

Abstract

The nematic liquid crystals (LC) containing core-shell nano-spheres can form a new type of metamaterial whose index of refraction is tunable from negative through zero to positive values. The core-shell nano-spheres can be made of polaritronic or semiconductor materials, and the liquid crystal can be in any of the nematic, ferroelectric or cholesteric phases. The combination of permittivities of non-magnetic materials at the appropriate resonances, in conjunction with the field-induced permittivity change in the LC host, give rise to the effective refractive index. The real part of effective refractive index of the nano-spheres dispersed liquid crystal (NDLC) for core and shell parameters can be computed using the Maxwell Garnet mixing rule. These reconfigurable materials can be very useful for designing tunable flat lenses operating in the optical domain.

Original languageEnglish (US)
Number of pages1
Volume17
No12
Specialist publicationOptics and Photonics News
DOIs
StatePublished - Jan 1 2006

Fingerprint

Liquid Crystals
Metamaterials
Liquid crystals
Refractive index
liquid crystals
refractivity
Permittivity
Nematic liquid crystals
Garnets
permittivity
Refraction
Ferroelectric materials
Lenses
garnets
Semiconductor materials
refraction
lenses

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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title = "Metamaterials: Nano-dispersed liquid crystal with tunable negative-zero-positive refractive indices",
abstract = "The nematic liquid crystals (LC) containing core-shell nano-spheres can form a new type of metamaterial whose index of refraction is tunable from negative through zero to positive values. The core-shell nano-spheres can be made of polaritronic or semiconductor materials, and the liquid crystal can be in any of the nematic, ferroelectric or cholesteric phases. The combination of permittivities of non-magnetic materials at the appropriate resonances, in conjunction with the field-induced permittivity change in the LC host, give rise to the effective refractive index. The real part of effective refractive index of the nano-spheres dispersed liquid crystal (NDLC) for core and shell parameters can be computed using the Maxwell Garnet mixing rule. These reconfigurable materials can be very useful for designing tunable flat lenses operating in the optical domain.",
author = "Iam-choon Khoo and Werner, {Douglas Henry} and A. Diaz",
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Metamaterials : Nano-dispersed liquid crystal with tunable negative-zero-positive refractive indices. / Khoo, Iam-choon; Werner, Douglas Henry; Diaz, A.

In: Optics and Photonics News, Vol. 17, No. 12, 01.01.2006.

Research output: Contribution to specialist publicationArticle

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