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; Dae Shik Seo

doi:10.1364/OE.18.021594

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, Dae Shik Seo

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

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 SnO_2-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.

Original language	English
Pages (from-to)	21594-21602
Number of pages	9
Journal	Optics Express
Volume	18
Issue number	21
DOIs	https://doi.org/10.1364/OE.18.021594
Publication status	Published - 2010 Oct 11

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OE.18.021594

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title = "Superior optical properties of homogeneous liquid crystal alignment on a tin (IV) oxide surface sequentially modulated via Ion Beam irradiation",

abstract = "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.",

author = "Kang, {Young Gu} and Park, {Hong Gyu} and Kim, {Hyung Jun} and Kim, {Young Hwan} and Oh, {Byeong Yun} and Kim, {Byoung Yong} and Kim, {Dai Hyun} and Seo, {Dae Shik}",

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T1 - Superior optical properties of homogeneous liquid crystal alignment on a tin (IV) oxide surface sequentially modulated via Ion Beam irradiation

AU - Kang, Young Gu

AU - Park, Hong Gyu

AU - Kim, Hyung Jun

AU - Kim, Young Hwan

AU - Oh, Byeong Yun

AU - Kim, Byoung Yong

AU - Kim, Dai Hyun

AU - Seo, Dae Shik

PY - 2010/10/11

Y1 - 2010/10/11

N2 - 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.

AB - 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.

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

Abstract

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