Extremely nonlinear photosensitive liquid crystals for image sensing and sensor protection

I. C. Khoo, M. V. Wood, M. Y. Shih, P. H. Chen

Research output: Contribution to journalArticlepeer-review

71 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 - May 1999

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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