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

I. C. Khoo, Tsung Hsien Lin

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


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
Issue number15
StatePublished - Aug 1 2012

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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