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

Jyun Ruei Wang, Chia Rong Lee, Mei Ru Lee, Andy Y.G. Fuh

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)110-112
頁數3
期刊Optics Letters
29
發行號1
DOIs
出版狀態Published - 2004 一月 1

All Science Journal Classification (ASJC) codes

  • 原子與分子物理與光學

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