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首页> 外文会议>Emerging liquid crystal technologies XI >Liquid crystal devices with continuous phase variation based on high-permittivity thin films
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Liquid crystal devices with continuous phase variation based on high-permittivity thin films

机译：基于高介电常数薄膜的具有连续相变的液晶装置

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摘要

Most liquid crystal devices use transparent conductive electrodes such as indium tin oxide (ITO) to apply a potential difference in order to achieve electro-optic switching. As an alternative, we study a device with narrow metallic electrodes in combination with dielectric layers with large dielectric permittivity. In this approach the applied voltage can be a continuous function of the lateral distance from the electrode line. Simulations for a one-dimensional beam-steering device show that the switching of the liquid crystal (LC) director depends indeed on the distance from the addressing electrodes and on the value of the relative permittivity. We show that in a device with electrodes spaced 60 μm apart, the LC director halfway between the electrodes shows a considerable reorientation, when a dielectric layer with permittivity of (ε)_(T) = 550 is used, whereas no reorientation is observed for the uncoated reference sample at the same voltage. An added advantage is that the proposed configuration only contains dielectric materials, without resistive losses, which means that almost no heat is dissipated. This indicates that this technology could be used in low-power LC devices. The results show that using dielectric thin films with high relative permittivity in liquid crystal devices could form a cost-efficient and low-power alternative to many LC technologies where a gradient electric field is desirable.
机译：大多数液晶装置使用诸如铟锡氧化物（ITO）的透明导电电极来施加电势差，以实现电光切换。作为替代方案，我们研究一种具有窄金属电极并结合具有大介电常数的介电层的器件。在这种方法中，所施加的电压可以是距电极线的横向距离的连续函数。一维光束转向设备的仿真显示，液晶（LC）指向矢的切换确实取决于与寻址电极的距离以及相对介电常数的值。我们显示，在电极间距为60μm的设备中，当使用介电常数为（ε）_（T）= 550的介电层时，电极之间的LC指向矢会显示出明显的重新取向，而对于相同电压下的未涂层参考样品。另一个优点是，建议的配置仅包含介电材料，而没有电阻损耗，这意味着几乎不会散发热量。这表明该技术可用于低功率LC设备。结果表明，在液晶器件中使用具有高相对介电常数的介电薄膜可以形成许多需要梯度电场的LC技术的经济高效且低功耗的替代品。

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  • 来源
    《Emerging liquid crystal technologies XI》|2016年|97690P.1-97690P.7|共7页
  • 会议地点 San Francisco CA(US)
  • 作者

    Oliver Willekens; Kristiaan Neyts; Jeroen Beeckman;

  • 作者单位

    Ghent University, Sint-Pietersnieuwstraat 41, Dept. ELIS, Ghent, Belgium,Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Belgium;

    Ghent University, Sint-Pietersnieuwstraat 41, Dept. ELIS, Ghent, Belgium,Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Belgium;

    Ghent University, Sint-Pietersnieuwstraat 41, Dept. ELIS, Ghent, Belgium,Center for Nano- and Biophotonics (NB-Photonics), Ghent University, Belgium;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    liquid crystal; dielectric layer; high-permittivity; gradient index;

    机译：液晶;介电层高介电常数梯度指数;

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