Journal
OPTICS EXPRESS
Volume 14, Issue 22, Pages 10558-10564Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.14.010558
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We create planar-periodic alignment in nematic liquid crystal (LC) cell by using a command layer of azo-dye molecules directly deposited on the cell substrates and exposed with two interfering laser beams of opposite circular polarizations. Permanent high efficiency polarization gratings are thus created. The diffraction efficiency of those gratings is controlled by a uniform electric field applied across the cell. The electrooptical properties of such polarization gratings are studied. Obtained gratings can be used for electrically controlled discrimination and detection of polarized components of light. (c) 2006 Optical Society of America.
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