Nonlinear optical grating diffraction in dye-doped blue-phase liquid crystals

Iam-choon Khoo, Tsung Hsien Lin

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Low-power cw lasers are employed to study grating formation in blue-phase liquid crystals. We observed that undoped samples exhibit vanishingly small optical nonlinearities whereas methyl-red-dye doped samples produce strong nonlinear self-diffraction effects. The nonlinearities are attributed to director axis reorientation, disorder, and lattice distortion by the laser-excited dye molecules. The magnitude of the observed intensity-dependent index coefficient is in the range of 10-4 - 10-3 cm 2/Watt.

Original languageEnglish (US)
Pages (from-to)3225-3227
Number of pages3
JournalOptics Letters
Volume37
Issue number15
DOIs
StatePublished - Aug 1 2012

Fingerprint

gratings (spectra)
dyes
liquid crystals
nonlinearity
retraining
lasers
gratings
disorders
coefficients
diffraction
molecules

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

@article{63f58ca941b64814ac40167521d6392c,
title = "Nonlinear optical grating diffraction in dye-doped blue-phase liquid crystals",
abstract = "Low-power cw lasers are employed to study grating formation in blue-phase liquid crystals. We observed that undoped samples exhibit vanishingly small optical nonlinearities whereas methyl-red-dye doped samples produce strong nonlinear self-diffraction effects. The nonlinearities are attributed to director axis reorientation, disorder, and lattice distortion by the laser-excited dye molecules. The magnitude of the observed intensity-dependent index coefficient is in the range of 10-4 - 10-3 cm 2/Watt.",
author = "Iam-choon Khoo and Lin, {Tsung Hsien}",
year = "2012",
month = "8",
day = "1",
doi = "10.1364/OL.37.003225",
language = "English (US)",
volume = "37",
pages = "3225--3227",
journal = "Optics Letters",
issn = "0146-9592",
publisher = "The Optical Society",
number = "15",

}

Nonlinear optical grating diffraction in dye-doped blue-phase liquid crystals. / Khoo, Iam-choon; Lin, Tsung Hsien.

In: Optics Letters, Vol. 37, No. 15, 01.08.2012, p. 3225-3227.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Nonlinear optical grating diffraction in dye-doped blue-phase liquid crystals

AU - Khoo, Iam-choon

AU - Lin, Tsung Hsien

PY - 2012/8/1

Y1 - 2012/8/1

N2 - Low-power cw lasers are employed to study grating formation in blue-phase liquid crystals. We observed that undoped samples exhibit vanishingly small optical nonlinearities whereas methyl-red-dye doped samples produce strong nonlinear self-diffraction effects. The nonlinearities are attributed to director axis reorientation, disorder, and lattice distortion by the laser-excited dye molecules. The magnitude of the observed intensity-dependent index coefficient is in the range of 10-4 - 10-3 cm 2/Watt.

AB - Low-power cw lasers are employed to study grating formation in blue-phase liquid crystals. We observed that undoped samples exhibit vanishingly small optical nonlinearities whereas methyl-red-dye doped samples produce strong nonlinear self-diffraction effects. The nonlinearities are attributed to director axis reorientation, disorder, and lattice distortion by the laser-excited dye molecules. The magnitude of the observed intensity-dependent index coefficient is in the range of 10-4 - 10-3 cm 2/Watt.

UR - http://www.scopus.com/inward/record.url?scp=84864682373&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84864682373&partnerID=8YFLogxK

U2 - 10.1364/OL.37.003225

DO - 10.1364/OL.37.003225

M3 - Article

VL - 37

SP - 3225

EP - 3227

JO - Optics Letters

JF - Optics Letters

SN - 0146-9592

IS - 15

ER -