In this work, the self-organized two-dimensional (2D) perovskite crystal sheet was synthesized for exciton-polariton studies. The layered 2D perovskite sheets naturally form Fabry-Pérot (F-P) optical cavities and exhibit evident cavity polariton modes. In the region of F-P cavity polariton modes, an exciton-polariton is formed by the superposition of strongly coupled exciton and photon states and the decreased spacing between two adjacent oscillation modes can be well explained by the formation of exciton polarities. Rabi splitting energy (Ω) evaluated from the energy-wavevector (E-k) dispersion relation of exciton-polariton coupling was about 259 ± 10 meV. For edge emissions of the laminated structure, the thickness-dependent quantum well exerts great influence on the band-gap absorption and emission. This work studies exciton-polariton properties in layered 2D perovskite sheets, making it possible application for polariton devices in the strong light-matter interaction region.

中文翻译：

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毫米大小的二维钙钛矿片的平面微腔中的激子-极化子性质。

在这项工作中，合成了自组织的二维（2D）钙钛矿晶体片，用于激子-极化子研究。分层的2D钙钛矿片材自然形成Fabry-Pérot（FP）光学腔，并表现出明显的腔极化模式。在FP腔极化子模式区域，通过强耦合激子和光子态的叠加形成了激子-极化子，并且通过激子极性的形成可以很好地解释两个相邻振荡模式之间间距的减小。由激子-极化子耦合的能量-波矢（Ek）色散关系评估的拉比分裂能（Ω）约为259±10 meV。对于层压结构的边缘发射，取决于厚度的量子阱对带隙吸收和发射产生很大影响。