Analysis and model of the photorefractive-like effect in non-conductive asymmetric liquid crystal hybrid cell

Paweł Moszczyński, Andrzej Walczak


In this paper we describe a non-conductive liquid crystal hybrid cell with the photoconductive polymer (PP) layer. The orientation of the liquid crystal (LC) molecules in the described optical device is controlled by an external electric field and proper illumination. Method to calculate photoinduced refractive index distribution in liquid crystal layer has been presented. We propose model of the space charge formation in photoconductive polymer layer in the presence of light. We assumed that the carriers generated by the light in the PP diffuse into unlighted area and drift in external field and local field of the generated charge. In determining the distribution of the space charge field, we take into account the field-induced charges on the borders of the individual layers. After calculation of the final distribution of space charge and proper field distribution, we determine the director field distribution and refractive index distribution in LC layer.

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Photonics Letters of Poland - A Publication of the Photonics Society of Poland
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ISSN: 2080-2242