论文标题
使用光谱椭圆法的新签名，用于强烈的光耦合
A new signature for strong light-matter coupling using spectroscopic ellipsometry
论文作者
论文摘要
当将分子谐振器的集合放置在限制的电磁场中时，可能会发生光 - 物质相互作用。在强耦合方案中，分子和电磁场之间的能量快速交换导致杂交光质体态的出现称为polaritons。存在多个标准来定义强耦合方案，通常是通过将极化带的分裂与未耦合模式的线宽进行比较。在这里，我们强调了这些标准的局限性，并使用光谱椭圆法研究（一种常用的光学特征技术）研究了强耦合。我们确定了椭圆测量相光谱中强耦合的新签名。结合椭圆幅度和相光谱产生了一个独特的拓扑特征，我们建议可以作为强耦合的新标准。我们的结果介绍了椭圆拓扑的概念，并可以进一步了解从弱耦合方案的过渡。
Light-matter interactions can occur when an ensemble of molecular resonators is placed in a confined electromagnetic field. In the strong coupling regime the rapid exchange of energy between the molecules and the electromagnetic field results in the emergence of hybrid light-matter states called polaritons. Multiple criteria exist to define the strong coupling regime, usually by comparing the splitting of the polariton bands with the linewidths of the uncoupled modes. Here we highlight the limitations of these criteria and study strong coupling using spectroscopic ellipsometry, a commonly used optical characterisation technique. We identify a new signature of strong coupling in ellipsometric phase spectra. Combining ellipsometric amplitude and phase spectra yields a distinct topological feature that we suggest could serve as a new criterion for strong coupling. Our results introduce the idea of ellipsometric topology and could provide further insight into the transition from the weak to strong coupling regime.
