Hybrid Polaritonics

混合极化激元

基本信息

批准号：
EP/M025330/1
负责人：
Pavlos Lagoudakis
金额：
$ 652.89万
依托单位：
University of Southampton
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2015
资助国家：
英国
起止时间：
2015 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FM025330%2F1
关键词：
Hybrid Polaritonics

项目摘要

Hybrid polaritonics combines the properties of different light emitting materials - organic polymers and semiconductors - in order to produce quasiparticles that combine the possibilities of both systems. "Polaritons" are quasi-particles that arise from strong coupling between light and matter. This means that they have hybrid properties, combining the mobility and flexibility of light, with the possibilities of interactions due to the matter component. At high enough densities, or low enough temperatures, polaritons can form a macroscopic coherent quantum state, a polariton condensate, or a polariton laser. Such a coherent state shows much of the same physics as Bose Einstein Condensation, as has been seen for cold atoms, but without requiring the ultra-low tempeatures required for atoms.Hybid polaritonics focuses on how, by combining different "matter" parts of the polariton, one can push these temperatures even higher, up to room temperature, and how one can engineer completely tunable system. The matter part of a polariton can come from any material which will absorb and emit light at a specific wavelength. Much existing work on polaritons is based on the material being inorganic semiconductors. These can be grown controllably, and one can drive such devices by passing an electrical current through them to make a polariton laser. However, the coupling between matter and light in semiconductors is not strong enough for these devices to work at room temperature. In contrast, organic molecules and polymers can show huge coupling strengths, but are generally poor electrical conductors. Our programme is to combine the benefits of both systems to provide a whole set of devices, operating at room temperature, based on the formation of polaritons. These devices will range from polariton lasers (providing a route to easily tunable lasers with very low threshold currents), to Terrahertz light sources (with applications in non-invasive medical imaging and explosives detection), to ultra-efficient light emitting diodes. To reach these ambitious objectives, we need to combine expertise from a wide number of fields. Our team contains world experts in light emitting polymers, semiconductor growth, characterisation and spectroscopy of polaritons, and in theoretical modelling. Members of our team have previously achieved the first realisations of polariton lasing, of strong coupling with organic materials, and of building hybrid polariton lasers. The possibility to combine this expertise draws on the unique strengths that the UK currently has in this area, and enables the combination of this expertise to be focussed on providing room temperature devices based on hybrid polaritonics, and to revolutionise this field.

混合偏光元素结合了不同发光材料（有机聚合物和半导体）的性质，以产生结合两种系统可能性的准颗粒。 “北极子”是由光和物质之间的强耦合产生的准粒子。这意味着它们具有混合特性，将光的迁移率和灵活性与由于物质成分引起的相互作用的可能性结合在一起。在足够高的密度或足够低的温度下，极性子可以形成宏观的相干量子态，偏振子冷凝物或极化激光器。这种连贯的状态与Bose Einstein的凝结相同，如冷原子所见，但不需要Atom所需的超低温度。HybidPolaritonics将如何通过将北极星的不同“物质”部分组合在一起，可以使这些温度更高，可以将这些温度提高到更高的室温，以使其变得更高，以使室温和室温更加完整，并且可以完全适合使用良好的系统。偏光子的物质部分可能来自任何将在特定波长下吸收并发出光的材料。北极子的许多现有工作是基于无机半导体的材料。这些可以可控制地生长，并且可以通过将电流传递到北极星激光器中来驱动此类设备。但是，半导体中物质和光之间的耦合不足以使这些设备在室温下工作。相反，有机分子和聚合物可以显示出巨大的耦合强度，但通常是电导体较差的。我们的计划是将两种系统的好处结合起来，以根据Polariton的形成在室温下运行一套设备。这些设备的范围从极化激光器（提供非常低阈值电流的易于调谐激光器的途径）到Terrahertz光源（在非侵入性医学成像和爆炸物检测中应用），再到超效的光发光发射二极管。为了达到这些雄心勃勃的目标，我们需要结合许多领域的专业知识。我们的团队包含世界发射聚合物，半导体生长，偏光子的表征和光谱以及理论建模方面的专家。我们团队的成员以前已经实现了极化激光，与有机材料以及建筑混合极化激光器的最初实现。结合这种专业知识的可能性取决于英国目前在该领域拥有的独特优势，并使该专业知识的结合可以集中在基于混合偏光元素的基础上提供室温设备，并彻底改变了该领域。