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Optics Letters

Optics Letters

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  • Vol. 30, Iss. 6 — Mar. 15, 2005
  • pp: 631–633

High diffraction efficiency and a quasi-permanent grating in photorefractive nematic liquid crystal at low temperature

Yanbo Pei, Fengfeng Yao, Chunfeng Hou, Xiudong Sun, and Zhongxiang Zhou  »View Author Affiliations


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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