Molecular Photonics in the Strong Coupling Regime

强耦合状态下的分子光子学

• 批准号: RGPIN-2020-06566
• 负责人: KénaCohen, Stéphane
• 金额: $ 3.64万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=741317
• 关键词: Molecular; Photonics; Strong; Coupling; Regime

Light-matter interaction is at the heart of most optical phenomena that we are familiar with such as absorption, emission and scattering. We normally treat these by assuming that light does not significantly modify the underlying electronic states of the material it interacts with. The extreme case where light-matter interaction is so strong that this assumption fails has been coined the strong coupling regime. In this regime, new half-light, half-matter quasiparticles called polaritons emerge. In thin films of organic semiconductors--the same class of materials used in display technologies and low-cost solar cells--polaritons can readily form at room temperature. This Program will study collective quantum phenomena in the strong-coupling regime. It will focus on two distinct regimes, where fascinating physics occur. First, at high densities, polaritons can form a macroscopic quantum state termed a Bose-Einstein condensate. We will engineer a novel type of polariton condensate, based on open-shell molecules that will allow for magneto-optical effects to emerge. In addition, we will use lattices of polariton condensates to simulate a complex phenomenon known as many-body localization. This will allow us to gain further understanding of the barrier between quantum and classical physics. Second, at low densities, the emergence of strong light-matter coupling can modify molecular processes that occur within or between organic molecules. The extent to which these processes can be modified depends strongly on the number of molecules per optical mode in the system. We will investigate modifications of two processes directly relevant to increasing the efficiency of organic light-emitting diodes: reverse intersystem crossing and triplet-triplet annihilation. By engineering nanoscale optical cavities, we will reach a regime where the rates for these processes can be significantly enhanced. The findings from this Program will have direct applications in sensing, optoelectronics and our ability to simulate complex quantum systems. At completion, the Program will have trained 3 PhD, 2 MSc and 5 undergraduate students with a broad skill set in photonics, semiconductor science, quantum technologies and nanofabrication highly needed to support priority areas in Canada's technology industry.

光 - 摩擦相互作用是我们熟悉的最光学现象的核心，例如吸收，发射和散射。我们通常通过假设光不会显着修改与之相互作用的材料的潜在电子状态来对待这些。极端的相互作用如此之强以至于这种假设失败的极端情况已经创造了强耦合方案。在这个制度中，出现了新的半灯，半灯的准颗粒。在有机半导体的薄膜中 - 在展示技术和低成本太阳能电池中使用的相同类型的材料 - 二极多子可以在室温下很容易形成。该计划将研究强耦合方案中的集体量子现象。它将集中在两种截然不同的政权上，这些制度发生了引人入胜的物理学。首先，在高密度下，极化子可以形成称为玻色丝凝结物的宏观量子状态。我们将基于开放式壳分子来设计一种新型的偏振子冷凝物，从而允许磁光效应出现。此外，我们将使用Polariton冷凝物的格子来模拟一种称为多体定位的复杂现象。这将使我们能够进一步了解量子和古典物理之间的障碍。其次，在低密度下，强度强的耦合的出现可以改变有机分子内或之间发生的分子过程。可以修改这些过程的程度在很大程度上取决于系统中每个光学模式的分子数量。我们将研究与提高有机发光二极管效率直接相关的两个过程的修改：反向间隔系统交叉和三胞胎 - 三个歼灭。通过工程纳米级光腔，我们将达到一个可以显着提高这些过程的速率的政权。该程序的发现将在传感，光电子学和我们模拟复杂量子系统的能力方面具有直接的应用。完成后，该计划将培训3次博士学位，2名MSC和5名本科生，具有广泛的光子学，半导体科学，量子技术和纳米化的技能，以支持加拿大技术行业的优先领域。