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Proceedings Paper

Photorefractivity and storage of holograhic gratings in dye- and fullerene-doped nematic liquid crystal film
Author(s): Iam-Choon Khoo; Hong Li; Y. Liang; Kon-Well Wang
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Paper Abstract

In this paper, we describe the basic mechanisms and dynamics of photorefractivity, and holographic grating formations in dye- and fullerene C60-doped nematic liquid crystal films. The effects are attributed to photo induced molecular axis reorientation in these nematic films. A nonlinear index coefficient n2 of 10-2 cm2/watt can be obtained in a 25 micrometer thick film, with an applied dc-voltage of approximately 1 volt. In fullerene C60-doped films, these laser induced gratings can be made permanent and electronically modulated; they can be turned off and on by an ac voltage with response times of approximately 100 microsecond(s) and a few ms, respectively.

Paper Details

Date Published: 18 August 1995
PDF: 12 pages
Proc. SPIE 2529, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications, (18 August 1995); doi: 10.1117/12.216993
Show Author Affiliations
Iam-Choon Khoo, The Pennsylvania State Univ. (United States)
Hong Li, The Pennsylvania State Univ. (United States)
Y. Liang, The Pennsylvania State Univ. (United States)
Kon-Well Wang, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 2529:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications
Francis T. S. Yu, Editor(s)

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