We demonstrate room temperature chiral coupling of valley excitons in a transition metal dichalcogenide monolayer with spin-momentum locked surface plasmons. At the onset of the strong coupling regime, we measure spin-selective excitation of directional flows of polaritons. Operating under such conditions, our platform yields surprisingly robust intervalley contrasts (ca. 40%) and coherence (ca. 5–8%) as opposed to their total absence for the uncoupled valley excitons at room temperature. These results open rich possibilities, easy to implement, in the context of chiral optical networks.

中文翻译：

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谷激子与自旋动量锁定表面等离激元的室温手性偶联。

我们演示了在自旋动量锁定表面等离激元过渡金属二卤化硅单层中谷类激子的室温手性偶联。在强耦合机制开始时，我们测量了极化子定向流的自旋选择性激发。在这样的条件下运行，我们的平台产生了出众的鲁棒的区间对比度（约40％）和相干性（约5–8％），与之相比，在室温下完全没有耦合谷色激子。这些结果在手性光学网络的背景下提供了易于实施的丰富可能性。