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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.

混合极化激元学结合了不同发光材料--有机聚合物和半导体--的特性，以产生准粒子，该准粒子将两种系统的可能性联合收割机结合起来。“极化激元”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，结合了光的流动性和灵活性，以及由于物质成分而相互作用的可能性。在足够高的密度或足够低的温度下，极化激元可以形成宏观相干量子态、极化激元凝聚或极化激元激光。这种相干态与玻色爱因斯坦凝聚态的物理性质基本相同，但不需要原子所需的超低温。混合极化激元学关注的是如何通过结合极化激元的不同“物质”部分，将这些温度推高到室温，以及如何设计完全可调谐的系统。极化激元的物质部分可以来自任何能够吸收和发射特定波长光的材料。现有的许多关于极化激元的工作是基于无机半导体材料。它们可以可控地生长，并且可以通过使电流通过它们来驱动这样的设备以制造极化激元激光器。然而，半导体中物质和光之间的耦合并不足以使这些器件在室温下工作。相比之下，有机分子和聚合物可以显示出巨大的耦合强度，但通常是不良的电导体。我们的计划是联合收割机结合两种系统的优点，提供一整套设备，在室温下运行，基于极化激元的形成。这些设备的范围将从极化激元激光器（提供一种易于调谐的激光器，具有非常低的阈值电流），太赫兹光源（在非侵入性医学成像和爆炸物检测中的应用），到超高效发光二极管。为了实现这些雄心勃勃的目标，我们需要将来自广泛领域的专门知识联合收割机结合起来。我们的团队包括发光聚合物、半导体生长、极化激元表征和光谱学以及理论建模方面的世界级专家。我们团队的成员以前已经实现了偏振激元激光的第一次实现，与有机材料的强耦合，以及构建混合偏振激元激光器。这种联合收割机的可能性利用了英国目前在这一领域的独特优势，并使这种专业知识的结合能够专注于提供基于混合极化激振的室温设备，并彻底改变这一领域。