Orientational optical nonlinearity of nematic liquid crystals for image conversion and optical limiting

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

Research output: Contribution to journalConference article

1 Scopus citations


We present a review of the basic mechanisms for laser induced refractive index changes associated with director axis reorientation in nematic liquid crystals. In methyl-red doped nematic liquid crystal (MRNLC), an index change coefficient of more than 10 cm2/GW has been obtained, allowing us to perform image conversion and optical limiting processes at very low optical intensities. In particular, we demonstrated a very large dynamic range twisted nematic liquid crystal limiter that will protect sensor from cw or long-pulse laser jamming.

Original languageEnglish (US)
Pages (from-to)52-60
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - Dec 1 1999
EventProceedings of the 1999 Liquid Crystals III - Denver, CO, USA
Duration: Jul 21 1999Jul 22 1999


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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