Polariton lasing and Bose-Einstein condensation in an electrically pumped system

电泵系统中的极化子激光和玻色-爱因斯坦凝聚

• 批准号: EP/H023259/1
• 负责人: Dmtriy Krizhanovskii
• 金额: $ 23.38万
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2010
• 资助国家: 英国
• 起止时间: 2010 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH023259%2F1
• 关键词: Polariton; lasing; Bose; Einstein; condensation

We propose to demonstrate the first electrically injected polariton laser. The physics underlying the operation of the laser, and the factors which lead to its optimum performance will be determined. The polariton laser is a new device concept which holds the promise of very low threshold coherent light emission, at the same time as corresponding to non-equilibrium Bose-Einstein condensation (BEC) in a solid state system. The strong coupling between excitons and photons in semiconductor microcavities leads to the formation of novel quasi-particles, exciton-polaritons. Such polaritons exhibit characteristic bosonic properties such as macroscopic occupation of individual quantum states and BEC in a system with long temporal and spatial coherence. Due to the photonic component of the polaritons, the macroscopically occupied polariton state emits coherent light, and forms the basis of a new type of light source, the polariton laser, in which coherent light is emitted without the need for population inversion. Until very recently nearly all work in this field has been carried out under conditions of optical excitation. From the device perspective, new impetus has been given by our recent observation of light emission from polariton states under electrical injection, followed very soon after by two other groups. This proposal aims to capitalise on our recent achievements and overall expertise in the field, to realise an important world first, the first electrically injected polariton laser, as required for real world applications of these novel devices.

我们打算演示第一台电注入极化激元激光器。将确定激光器操作的物理基础以及导致其最佳性能的因素。极化激元激光器是一种新的器件概念，它具有非常低的阈值相干光发射的前景，同时对应于固态系统中的非平衡玻色-爱因斯坦凝聚（BEC）。半导体微腔中激子与光子的强耦合导致了新型准粒子激子-极化激元的形成。这样的极化激元表现出玻色子的特性，如宏观占领的个人量子态和BEC在一个系统中具有长的时间和空间的相干性。由于极化激元的光子成分，宏观占据的极化激元态发出相干光，并形成了一种新型光源的基础，即极化激元激光器，其中相干光在不需要粒子数反转的情况下发出。直到最近，几乎所有在这一领域的工作都是在光激发条件下进行的。从器件的角度来看，我们最近观察到电注入下极化子态的光发射，这给了我们新的动力，紧接着是另外两个小组。该提案旨在利用我们最近的成就和该领域的整体专业知识，实现一个重要的世界第一，第一个电注入偏振激元激光器，因为这些新设备的真实的世界应用所需的。