Basic research on the optical Kerr effect seen in liquid crystals and its potential for use in liquid crystal over silicon technology.

关于液晶中光学克尔效应的基础研究及其在硅液晶技术中的应用潜力。

• 批准号: 220040763
• 负责人: Dr. Alexander Lorenz
• 金额: --
• 依托单位: Arbeitskreis Photonische Kristalle, Flüssigkristalle
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/220040763?language=en
• 关键词: Basic; research; optical; Kerr; effect

Liquid crystal over silicon (LCOS) technology is quickly evolving in several markets ranging from adaptive optics to miniature projectors. Transparent liquid crystal displays are widely used in television screens, tablet PCs, and smart phones. However, transparent displays cannot be miniaturized arbitrarily. In contrast, LCOS technology allows for high resolution microdisplays. In order to display on large screens, LCOS micro¬displays are traditionally used in projecting devices, such as rear projection televisions where the LCOS-chip is based on intensity modulation. Additionally to intensity modulation, liquid crystals can also be used for phase modulation very efficiently. LCOS microdisplays can be used to achieve holographic projection of 2D and 3D videos with brilliant colors. Currently, LCOS devices based on phase modulating planar aligned nematic LCs are only capable of achieving rather slow frame rates.Liquid crystals can show faster electro optic effects. One of these effects is induced birefringence (Kerr effect). Although, the Kerr effect has been and currently is thoroughly investigated in transparent liquid crystal devices, these devices still suffer from high driving voltages. The proposed research project shows that LCOS-technology can benefit from the use of liquid crystals, which show the Kerr effect. For example, the process of fabricating LCOS devices is considerably simplified, because anchoring layers, which are required by alternative approaches, can be waived. Moreover, the use of such liquid crystals can lead to higher frame rates. Silicon technology is ideally suited in order to investigate, if smart electrode design can lead to lower driving voltages.

从自适应光学到微型投影仪，液晶硅（LCOS）技术在多个市场迅速发展。透明液晶显示器广泛应用于电视屏幕、平板电脑和智能手机。然而，透明显示器不能任意小型化。相比之下，LCOS技术允许高分辨率微显示器。为了在大屏幕上显示，LCOS微型显示器传统上用于投影设备，如背投电视，其中LCOS芯片基于强度调制。除了强度调制外，液晶还可以非常有效地用于相位调制。LCOS微显示器可以实现2D和3D视频的全息投影，具有绚丽的色彩。目前，基于相位调制平面排列向列lc的LCOS器件只能实现相当慢的帧速率。液晶可以显示更快的电光效应。其中一种效应是诱导双折射（克尔效应）。虽然克尔效应已经在透明液晶器件中得到了深入的研究，但这些器件仍然受到高驱动电压的影响。提出的研究项目表明，lcos技术可以受益于液晶的使用，液晶表现出克尔效应。例如，制造LCOS器件的过程大大简化，因为可以免除其他方法所需的锚定层。此外，使用这种液晶可以导致更高的帧速率。如果智能电极设计可以降低驱动电压，那么硅技术是研究的理想选择。

项目成果

Bilayers in nanoparticle-doped polar mesogens.

纳米颗粒掺杂极性介晶中的双层

• DOI: 10.1103/physreve.88.062505
• 发表时间: 2013
• 期刊: Physical review. E, Statistical, nonlinear, and soft matter physics
• 作者: A. Lorenz;N. Zimmermann;S. Kumar;D. R. Evans;G. Cook;H.-S. Kitzerow
• 通讯作者: H.-S. Kitzerow

Electrical addressing of polymer stabilized hyper-twisted chiral nematic liquid crystals with interdigitated electrodes: Experiment and model

• DOI: 10.1063/1.4865558
• 发表时间: 2014-02
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: A. Lorenz;D. Gardiner;S. Morris;F. Castles;M. Qasim;S. Choi;Wook-Sung Kim;H. Coles;T. Wilkinson-T.-Wi

A nano-patterned photonic crystal laser with a dye-doped liquid crystal

• DOI: 10.1063/1.4816243
• 发表时间: 2013-07-29
• 期刊: APPLIED PHYSICS LETTERS
• 影响因子: 4
• 作者: Ko, Doo-Hyun;Morris, Stephen M.;Friend, Richard H.
• 通讯作者: Friend, Richard H.