Liquid crystal photorefractivity for reordering holographic gratings

Iam-Choon Khoo

doi:10.1117/12.235363

11 March 1996 Liquid crystal photorefractivity for reordering holographic gratings

Iam-Choon Khoo

Author Affiliations +

Proceedings Volume 2651, Liquid Crystal Materials, Devices, and Applications IV; (1996) https://doi.org/10.1117/12.235363
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

Abstract

We present a detailed discussion of the fundamental mechanisms for recently observed persistent photorefractive effects in nematic liquid crystal films. A theoretical analysis of the various space charge fields, dielectric torques, and estimates of their magnitudes and critical assessment of their roles in the observed holographic grating formation process are presented. In dye- or Fullerene C₆₀-doped films, it is observed that the induced director axis and refractive index grating could persist indefinitely. Furthermore, these stored gratings can be electrically switched on and off at ms-subms speed.

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Iam-Choon Khoo "Liquid crystal photorefractivity for reordering holographic gratings", Proc. SPIE 2651, Liquid Crystal Materials, Devices, and Applications IV, (11 March 1996); https://doi.org/10.1117/12.235363

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