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Transient and persistent holographic gratings have been observed in dye- and fullerene C(60)-doped nematic liquid-crystal films. The nature and time evolution of the underlying mechanisms, such as space-charge field production, flows, and dielectric- and conductivity-induced torques, and the resultant director axis reorientation and refractive-index gratings are examined.
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Iam Choon Khoo (1995) studied this question.
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