Extremely nonlinear photosensitive liquid crystals for image sensing and sensor protection

Iam-choon Khoo, M. V. Wood, M. Y. Shih, P. H. Chen

Research output: Contribution to journalArticle

61 Scopus citations


Optically induced nematic liquid crystal axis reorientation results in extraordinarily large nonlinear refractive index changes that could find practical applications in conjunction with cw or long-pulse lasers. We discuss the origins of these nonlinearities, and present the results of recent experimental studies of image conversion, optical limiting and sensor protection using aligned dye-doped nematic liquid crystal films in all-optical configurations. These processes are characterized by unprecedented low threshold laser powers, thus presenting nonlinear photosensitive nematic liquid crystals as promising next generation image processing and optical switching/limiting material.

Original languageEnglish (US)
Pages (from-to)432-442
Number of pages11
JournalOptics Express
Issue number11
StatePublished - Jan 1 1999

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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