Abstract
Photoinduced reorientation in azo dye doped liquid crystals (NLCs) is investigated with consideration of photoisomerization. A model that describes photoinduced reorientation in the presence of photoisomerization [1] is verified in different experimental ways, extending previous investigations. We show that both the magnitude and the sign of the optical nonlinearity for an extraordinary beam can be controlled by an ordinarily polarized beam. Such a control of the nonlinearity provides a new functionality for optical switching and optically addressable spatial light modulators.
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