Supra optical nonlinearities of photosensitive nematic liquid crystals

I. C. Khoo, M. Y. Shih, A. Shishido

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


A critical review of laser induced nonlinear index changing mechanisms in liquid crystals is presented. In some azo-compound doped nematic films, we have observed nonlinear index coefficient ≫ 1 cm2/W. The supra optical nonlinearities are attributed to photorefractivity, order parameter modification and dopant-nematic intermolecular torques. Using these nematic films, we show that it is possible to perform image processing with μW/cm2 optical intensity, and optical limiting with μW power lasers.

Original languageEnglish (US)
Pages (from-to)141-149
Number of pages9
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
StatePublished - Jan 1 2001

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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