Excitonic spectral features in strongly coupled organic polaritons
Excitonic spectral features in strongly coupled organic polaritons
复制标题
DOI：
10.1103/physreva.93.033840
复制
发表时间：
2016-03-22
影响因子：
2.9
通讯作者：
Keeling, Jonathan
中科院分区：
文献类型：
--
作者：
Cwik, Justyna A.;Kirton, Peter;Keeling, Jonathan
从微观模型出发，我们研究了强耦合有机微腔中分子的光谱，研究了它们如何自一致地适应光的耦合。我们考虑了旋转自由度和振动自由度，重点关注在裸激子频率下光谱中心的峰值中可以看到的特征。在这两种情况下，我们发现物质-光耦合可以导致分子状态的自一致变化，从而在吸收光谱中具有温度依赖的特征。然而，对于典型的参数，这些影响太弱，无法解释最近的测量结果。我们证明了另一种机制，它自然地从我们的振动打扮极化子模型中产生，具有正确的大小和温度依赖于观测数据的起源。
Starting from a microscopic model, we investigate the optical spectra of molecules in strongly coupled organic microcavities examining how they might self-consistently adapt their coupling to light. We consider both rotational and vibrational degrees of freedom, focusing on features which can be seen in the peak in the center of the spectrum at the bare excitonic frequency. In both cases we find that the matter-light coupling can lead to a self-consistent change of the molecular states, with consequent temperature-dependent signatures in the absorption spectrum. However, for typical parameters, these effects are much too weak to explain recent measurements. We show that another mechanism which naturally arises from our model of vibrationally dressed polaritons has the right magnitude and temperature dependence to be at the origin of the observed data.