Supra optical nonlinearities of photosensitive nematic liquid crystals

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

doi:10.1080/10587250108024984

Supra optical nonlinearities of photosensitive nematic liquid crystals

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

Materials Research Institute (MRI)

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

6 Scopus citations

Abstract

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 language	English (US)
Pages (from-to)	141-149
Number of pages	9
Journal	Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume	364
DOIs	https://doi.org/10.1080/10587250108024984
State	Published - Jan 1 2001

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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AB - 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.

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Supra optical nonlinearities of photosensitive nematic liquid crystals

Abstract

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