Journal
OPTICS EXPRESS
Volume 18, Issue 21, Pages 21594-21602Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.18.021594
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- Korea Institute of Industrial Technology(KITECH) [70004742] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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. (C) 2010 Optical Society of America
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