High diffraction efficiency and a quasi-permanent grating in photorefractive nematic liquid crystal at low temperature
Optics Letters, Vol. 30, Issue 6, pp. 631-633 (2005)
http://dx.doi.org/10.1364/OL.30.000631
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Abstract
At a temperature lower than the melting point of pure pentyl-cyanobiphenyl liquid crystal (5CB) we studied the photorefractive effect of 5CB heavily doped with fullerene (C_60) and obtained a diffraction efficiency of the photorefractive grating of more than 40%, which is more than twice as high as the best data reported to our knowledge. A quasi-permanent grating was observed with a diffraction efficiency of 11.2% after the grating was kept in the dark for a month.
© 2005 Optical Society of America
OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(160.3710) Materials : Liquid crystals
(160.5320) Materials : Photorefractive materials
(190.5330) Nonlinear optics : Photorefractive optics
Citation
Yanbo Pei, Fengfeng Yao, Chunfeng Hou, Xiudong Sun, and Zhongxiang Zhou, "High diffraction efficiency and a quasi-permanent grating in photorefractive nematic liquid crystal at low temperature," Opt. Lett. 30, 631-633 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-6-631
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