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Novel Electro-optic and Photonic Behaviours in Bent Core Liquid Crystals

弯芯液晶中新颖的电光和光子行为

基本信息

批准号：
EP/L012111/1
负责人：
Helen Gleeson
金额：
$ 13.35万
依托单位：
University of Manchester
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2014
资助国家：
英国
起止时间：
2014 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FL012111%2F1
关键词：
Novel Electro optic Photonic Behaviours

项目摘要

Liquid crystals are self-organizing fluids that display a remarkable array of structures, each of which has subtly different physical properties. They are best known for their use in liquid crystal devices (LCD), a hugely successful technology in which cigar-shaped molecules are organized so that on average their long-axes point along a direction that can be controlled by an electric field. The ordered structure they form is birefringent, so interacts with polarized light, and LCDs result when the birefringence, and hence transmission of polarized light, is modulated by a voltage. Control of the molecular shape and structure can result in the formation of different liquid crystal phases and offer a route to control many desirable properties. In this proposal, we aim to exploit some very new research in which the molecular structure has a bent-core, leading to a new class of nematic liquid crystals with properties that can include ferroelectricity, biaxiality, enhanced flexoelectricty, unusual visco-elastic behaviour and therefore new electro-optic effects. We propose to produce such materials that are room-temperature and to generate a detailed understanding of their physical properties. We expect that this will lead us to new kinds of fast switching that could either be used in displays or indeed in other kinds of electro-optic devices. For example, we expect that some of these materials will exhibit optical nonlinearity - this means that when red light is shone into them, blue light emerges (this is known as frequency doubling), and such materials find uses in photonic devices such as lasers.The research period is a short one as we wish to make rapid use of our existing expertise in a subject area that is changing rapidly. We believe that we can carry out sufficient research in a year, using fully trained personnel in an environment where we have all of the necessary experimental methods at our fingertips, to understand which areas need further research, and which can lead immediately to technology that is ripe for transfer to our industrial colleagues via 'follow on' or other knowledge exchange mechanisms. Therefore, we expect this research programme to be very cost-effective, delivering several high-quality papers on the fundamentals of these systems, and also to lead to high impact as we transfer some of the most interesting technology to our industrial colleagues.

液晶是一种自组织的流体，它显示出一系列非凡的结构，每一种结构都有微妙的不同物理性质。它们以在液晶器件（LCD）中的应用而闻名，这是一项非常成功的技术，其中雪茄形状的分子被组织起来，使得它们的长轴平均沿着一个可以由电场控制的方向指向。它们形成的有序结构是双折射的，因此与偏振光相互作用，当双折射以及偏振光的透射被电压调制时，液晶显示器就产生了。控制分子的形状和结构可以导致形成不同的液晶相，并提供一种控制许多所需性能的途径。在这项提案中，我们的目标是利用一些非常新的研究，其中分子结构具有一个双核心，导致一类新的双液晶，其性质可以包括铁电性，双轴性，增强的挠曲电性，不寻常的粘弹性行为，因此新的电光效应。我们建议生产这种室温材料，并对其物理性质产生详细的了解。我们希望这将引导我们找到新型的快速开关，可以用于显示器或其他类型的电光设备。例如，我们期望这些材料中的一些将表现出光学非线性-这意味着当红光照射到它们时，蓝光出现（这被称为倍频），并且这些材料在激光器等光子器件中找到用途。研究周期很短，因为我们希望在一个快速变化的主题领域快速利用我们现有的专业知识。我们相信，我们可以在一年内进行足够的研究，在我们拥有所有必要实验方法的环境中，使用训练有素的人员，了解哪些领域需要进一步研究，哪些领域可以立即导致技术成熟，可以通过“后续”或其他知识交流机制转移给我们的工业同行。因此，我们希望这项研究计划具有很高的成本效益，能够就这些系统的基本原理发表几篇高质量的论文，并在我们将一些最有趣的技术转让给工业界同事时产生很大的影响。

项目成果

期刊论文数量（10）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Liquid crystal blue phases: stability, field effects and alignment

DOI：
10.1080/02678292.2014.1002821
发表时间：
2015-03
期刊：
Liquid Crystals
影响因子：
2.2
作者：
H. Gleeson;R. Miller;L. Tian;V. Görtz;J. Goodby
通讯作者：
H. Gleeson;R. Miller;L. Tian;V. Görtz;J. Goodby

Flexoelectricity in an oxadiazole bent-core nematic liquid crystal

DOI：
10.1063/1.4903242
发表时间：
2014-12
期刊：
Applied Physics Letters
影响因子：
4
作者：
S. Kaur;V. Panov;C. Greco;A. Ferrarini;V. Görtz;J. Goodby;H. Gleeson
通讯作者：
S. Kaur;V. Panov;C. Greco;A. Ferrarini;V. Görtz;J. Goodby;H. Gleeson

Second-harmonic generation and the influence of flexoelectricity in the nematic phases of bent-core oxadiazoles

DOI：
10.1080/02678292.2016.1172355
发表时间：
2016-04
期刊：
Liquid Crystals
影响因子：
2.2
作者：
J. Addis;S. Kaur;D. Binks;M. Dickinson;C. Greco;A. Ferrarini;V. Görtz;J. Goodby;H. Gleeson
通讯作者：
J. Addis;S. Kaur;D. Binks;M. Dickinson;C. Greco;A. Ferrarini;V. Görtz;J. Goodby;H. Gleeson

Understanding the unusual reorganization of the nanostructure of a dark conglomerate phase.

了解暗砾岩相纳米结构的异常重组。