We provide a simple method that enables readily acquired experimental data to be used to predict whether or not a candidate molecular material may exhibit strong coupling. Specifically, we explore the relationship between the hybrid molecular/photonic (polaritonic) states and the bulk optical response of the molecular material. For a given material, this approach enables a prediction of the maximum extent of strong coupling (vacuum Rabi splitting), irrespective of the nature of the confined light field. We provide formulae for the upper limit of the splitting in terms of the molar absorption coefficient, the attenuation coefficient, the extinction coefficient (imaginary part of the refractive index) and the absorbance. To illustrate this approach, we provide a number of examples, and we also discuss some of the limitations of our approach.

中文翻译：

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分子系统中的强耦合：采用常规光学测量的简单预测器

我们提供了一种简单的方法，可以轻松获取实验数据，用于预测候选分子材料是否可能表现出强耦合。具体来说，我们探索了混合分子/光子（极化）态与分子材料的体光学响应之间的关系。对于给定的材料，这种方法可以预测强耦合（真空拉比分裂）的最大程度，而不管受限光场的性质如何。我们提供了摩尔吸收系数、衰减系数、消光系数（折射率的虚部）和吸光度方面的分裂上限的公式。为了说明这种方法，我们提供了许多示例，并且还讨论了我们方法的一些局限性。