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A liquid-crystalline polymer (LCP) containing an azotolane group in the mesogenic moeity has been synthesized (see Figure). A homogeneously aligned film of the LCP exhibits an extremely large birefringence in a wide wavelength range. Upon irradiation by a pump laser beam, a large change in birefringence is quickly induced as a result of destruction of the homogeneous alignment of the azotolane moieties.
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Okano et al. (2006) studied this question.
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