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Optics Letters

Optics Letters


  • Vol. 29, Iss. 1 — Jan. 1, 2004
  • pp: 110–112

Photorefractive effect induced by polarization gratings in dye-doped liquid crystals

Jyun-Ruei Wang, Chia-Rong Lee, Mei-Ru Lee, and Andy Y.-G. Fuh  »View Author Affiliations

Optics Letters, Vol. 29, Issue 1, pp. 110-112 (2004)

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We report on the photorefractive effect induced by a polarization grating in the presence of dc voltage in a dye-doped liquid-crystal (DDLC) film. The writing beams are two orthogonally (left- and right-circularly) polarized laser beams that create a spatially polarization-modulated interference field with constant intensity. The photorefractivity is ascribed to the absorption anisotropy of the azo dye. The unique dichroism of a DDLC cell causes a spatial variation in the absorption of light in response to a polarization-modulated interference field. Such a variation establishes a space-charge field in the presence of dc voltage, generating photorefractivity. Two-beam couplings were also verified and measured dynamically during the formation of the photorefractive grating in this study.

© 2004 Optical Society of America

OCIS Codes
(090.2900) Holography : Optical storage materials
(190.5330) Nonlinear optics : Photorefractive optics
(210.4810) Optical data storage : Optical storage-recording materials

Jyun-Ruei Wang, Chia-Rong Lee, Mei-Ru Lee, and Andy Y.-G. Fuh, "Photorefractive effect induced by polarization gratings in dye-doped liquid crystals," Opt. Lett. 29, 110-112 (2004)

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