Diffraction from holographic gratings in polymer-dispersed liquid crystals recorded by means of polarization light patterns
JOSA B, Vol. 18, Issue 12, pp. 1821-1826 (2001)
http://dx.doi.org/10.1364/JOSAB.18.001821
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Abstract
An experimental and theoretical study of holographic gratings recorded exposing a homogeneous mixture of prepolymer and liquid crystals to a polarization light pattern is reported. The polarization pattern is obtained by a superposition of two waves with orthogonal linear polarization. This technique is based on the possibility of controlling the liquid-crystal alignment inside the droplets, through the photoalignment, during the photoinduced polymerization and the phase separation processes that precede the formation of polymer-dispersed liquid crystals. Diffraction gratings with a large anisotropy were observed, indicating a particular alignment of the liquid crystals inside the droplets. An investigation of the polarization properties of this grating and an explanation of the obtained results are presented.
© 2001 Optical Society of America
[Optical Society of America ]
OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(090.2900) Holography : Optical storage materials
(160.3710) Materials : Liquid crystals
(160.5470) Materials : Polymers
Citation
G. Cipparrone, A. Mazzulla, and G. Russo, "Diffraction from holographic gratings in polymer-dispersed liquid crystals recorded by means of polarization light patterns," J. Opt. Soc. Am. B 18, 1821-1826 (2001)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-18-12-1821
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