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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 4, Iss. 11 — May. 24, 1999
  • pp: 432–442

Extremely nonlinear photosensitive liquid crystals for image sensing and sensor protection

I. C. Khoo, M. V. Wood, M. Y. Shih, and P. H. Chen  »View Author Affiliations


Optics Express, Vol. 4, Issue 11, pp. 432-442 (1999)
http://dx.doi.org/10.1364/OE.4.000432


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Abstract

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.

© Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(190.4400) Nonlinear optics : Nonlinear optics, materials
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Focus Issue: Sensing

History
Original Manuscript: March 29, 1999
Published: May 24, 1999

Citation
I. C. Khoo, M. Wood, M. Y. Shih, and P. Chen, "Extremely nonlinear photosensitive liquid crystals for image sensing and sensor protection," Opt. Express 4, 432-442 (1999)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-4-11-432


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References

  1. I. C. Khoo Liquid Crystals: Physical Properties and Nonlinear Optical Phenomena (Wiley Interscience, NY. 1994).
  2. I. C. Khoo and S. T. Wu Optics and Nonlinear Optics of Liquid Crystals (World Scientific, River Edge, New Jersey, USA 1993). [CrossRef]
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  5. I. C. Khoo, S. Slussarenko, B. D. Guenther, Min-Yi Shih, P. H. Chen and M. V. Wood. "Optically induced space charge fields, DC voltage, and extraordinarily large nonlinearity in Dye-doped Nematic Liquid Crystals," Opt. Lett. 23, 253-255 (1998). [CrossRef]
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  9. M. A. Kramer, C. J. Wetterer and T. Martinez, "One-way imaging through an aberrator with spatially incoherent light by using an optically addressed spatial light modulator," Appl. Opt. 30, 3319-3323 (1991). [CrossRef] [PubMed]
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  11. I. C. Khoo, M. V. Wood, B. D. Guenther, Min-Yi Shih, P. H. Chen, Zhaogen Chen and Xumu Zhang, "Nonlinear optical liquid cored fiber array and liquid crystal film for ps-cw frequency agile laser optical limiting application," Opt. Express 2, 471-482, (1998); http://www.opticsexpress.org/oearchive/source/4201.htm. [CrossRef]
  12. I. C. Khoo, M. V. Wood, B. D. Guenther, Min-Yi shih and P. H. Chen, "Nonlinear- absorption and optical limiting of laser pulses in a liquid-cored fiber array," J. Opt. Soc. Am. B (USA) 15, 1533 (1998), USA Patent no. 5,589,101 (1996). [CrossRef]

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