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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 2, Iss. 12 — Dec. 1, 2012
  • pp: 1791–1796

Electrically tunable prism grating based on a liquid crystal film with a photoconductive layer

Shuan-Yu Huang, He-Yi Zheng, Kai-Yu Yu, Bing-Yau Huang, Hong-Ren Lin, Chia-Rong Lee, and Chie-Tong Kuo  »View Author Affiliations


Optical Materials Express, Vol. 2, Issue 12, pp. 1791-1796 (2012)
http://dx.doi.org/10.1364/OME.2.001791


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Abstract

This study is the first to investigate an optically addressed, electrically tunable prism grating based on homogeneously aligned liquid crystals (LCs) with a photoconductive layer. A conductivity-gradient electrode-like grating pattern of the polymer layer results in a spatially periodic gradient of the effective electric-field drop, producing a prism grating with a spatially periodic LC gradient reorientation. The asymmetric diffraction pattern can be adjusted by varying the dc voltage. The first-order diffraction efficiency is 64% at optimal conditions. The proposed prism grating exhibits extremely low diffraction noise in the off state, a high switching contrast inthe on–off state (~1000), simplicity of fabrication, and high controllability at a low voltage range (0 to 0.4 V/μm).

© 2012 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(160.3710) Materials : Liquid crystals
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Liquid Crystals

History
Original Manuscript: October 26, 2012
Revised Manuscript: November 15, 2012
Manuscript Accepted: November 16, 2012
Published: November 19, 2012

Citation
Shuan-Yu Huang, He-Yi Zheng, Kai-Yu Yu, Bing-Yau Huang, Hong-Ren Lin, Chia-Rong Lee, and Chie-Tong Kuo, "Electrically tunable prism grating based on a liquid crystal film with a photoconductive layer," Opt. Mater. Express 2, 1791-1796 (2012)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-2-12-1791


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