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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 21 — Oct. 11, 2010
  • pp: 21594–21602

Superior optical properties of homogeneous liquid crystal alignment on a tin (IV) oxide surface sequentially modulated via ion beam irradiation

Young-Gu Kang, Hong-Gyu Park, Hyung-Jun Kim, Young-Hwan Kim, Byeong-Yun Oh, Byoung-Yong Kim, Dai-Hyun Kim, and Dae-Shik Seo  »View Author Affiliations

Optics Express, Vol. 18, Issue 21, pp. 21594-21602 (2010)

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We first investigated the alignment characteristics of tin (IV) oxide (SnO2) thin films deposited by radio-frequency (RF) magnetron sputtering. This study demonstrates that liquid crystal (LC) molecules could be aligned homogeneously by controlling the Ion Beam (IB) irradiation energy densities. We also show that the pretilt angle of the LC molecules has a close relation with the surface energy. X-ray photoelectron spectroscopy (XPS) indicates that a non-stoichiometric SnO2-x surface converted by ion beam irradiation can horizontally align the LC molecules. The measured electro-optical (EO) characteristics showed high performance, comparable with those of rubbed and ion-beam irradiated polyimide (PI) layers.

© 2010 OSA

OCIS Codes
(160.3710) Materials : Liquid crystals
(160.4760) Materials : Optical properties
(220.1140) Optical design and fabrication : Alignment

ToC Category:

Original Manuscript: March 16, 2010
Revised Manuscript: September 23, 2010
Manuscript Accepted: September 26, 2010
Published: September 28, 2010

Young-Gu Kang, Hong-Gyu Park, Hyung-Jun Kim, Young-Hwan Kim, Byeong-Yun Oh, Byoung-Yong Kim, Dai-Hyun Kim, and Dae-Shik Seo, "Superior optical properties of homogeneous liquid crystal alignment on a tin (IV) oxide surface sequentially modulated via ion beam irradiation," Opt. Express 18, 21594-21602 (2010)

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