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

I. C. Khoo; Tsung Hsien Lin

doi:10.1364/OL.37.003225

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

I. C. Khoo
, Tsung Hsien Lin

Electrical Engineering

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

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 language	English (US)
Pages (from-to)	3225-3227
Number of pages	3
Journal	Optics Letters
Volume	37
Issue number	15
DOIs	https://doi.org/10.1364/OL.37.003225
State	Published - Aug 1 2012

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OL.37.003225

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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.",

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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.

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

Abstract

All Science Journal Classification (ASJC) codes

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