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Exposing a uniformly aligned discotic columnar liquid crystal to an argon ion laser beam results in a reorientation, thereby changing the optical properties of the liquid crystal. We have studied this new optical storage effect for a polymer dispersed metallomesogenic compound which exhibits a columnar phase at room temperature. The writing energy is 3.5J cm -2. The stored information can be erased by heating and subsequent shearing of the sample.
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Forget et al. (1997) studied this question.
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