Holographic grating formation in dye- or fullerene-C60-doped liquid crystals

Research output: Contribution to specialist publicationArticle

2 Citations (Scopus)

Abstract

Nematic crystals (NLC) are characterized by large birefringence that spans a broad spectral range, and large susceptibility to ac, dc, and optical fields. Recently, a nonlinear electro-optical effect in dye- or fullerene C60-doped NCL films was discovered. By theory and experiments, the possibility of using low power lasers of a few milliwatts is demonstrated in conjunction with a small dc field to induce persistent realignment of the liquid crystal director axis, and thus a 'stored' refractive index change in these films. An application of the observed effect is holographic grating generation. In a study, it is shown that gratings can be recorded in these NLC films with a nonlinear sensitivity as high as other materials such as doped glasses or photorefractive crystals.

Original languageEnglish (US)
Pages29-30
Number of pages2
Volume6
No12
Specialist publicationOptics and Photonics News
DOIs
StatePublished - Jan 1 1995

Fingerprint

Holographic gratings
Liquid Crystals
Fullerenes
doped crystals
Liquid crystals
fullerenes
Coloring Agents
Dyes
dyes
liquid crystals
gratings
electro-optical effect
Photorefractive crystals
Electrooptical effects
Birefringence
crystals
birefringence
Refractive index
refractivity
magnetic permeability

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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abstract = "Nematic crystals (NLC) are characterized by large birefringence that spans a broad spectral range, and large susceptibility to ac, dc, and optical fields. Recently, a nonlinear electro-optical effect in dye- or fullerene C60-doped NCL films was discovered. By theory and experiments, the possibility of using low power lasers of a few milliwatts is demonstrated in conjunction with a small dc field to induce persistent realignment of the liquid crystal director axis, and thus a 'stored' refractive index change in these films. An application of the observed effect is holographic grating generation. In a study, it is shown that gratings can be recorded in these NLC films with a nonlinear sensitivity as high as other materials such as doped glasses or photorefractive crystals.",
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Holographic grating formation in dye- or fullerene-C60-doped liquid crystals. / Khoo, Iam-choon.

In: Optics and Photonics News, Vol. 6, No. 12, 01.01.1995, p. 29-30.

Research output: Contribution to specialist publicationArticle

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