Sitnik Kirill A, Alyatkin Sergey, Töpfer Julian D, Gnusov Ivan, Cookson Tamsin, Sigurdsson Helgi, Lagoudakis Pavlos G
Hybrid Photonics Laboratory, Skolkovo Institute of Science and Technology, Territory of Innovation Center Skolkovo, Bolshoy Boulevard 30, Building 1, 121205 Moscow, Russia.
Science Institute, University of Iceland, Dunhagi 3, IS-107 Reykjavik, Iceland.
Phys Rev Lett. 2022 Jun 10;128(23):237402. doi: 10.1103/PhysRevLett.128.237402.
We demonstrate spontaneous formation of a nonlinear vortex cluster state in a microcavity exciton-polariton condensate with time-periodic sign flipping of its topological charges at the GHz scale. When optically pumped with a ring-shaped nonresonant laser, the trapped condensate experiences intricate high-order mode competition and fractures into two distinct trap levels. The resulting mode interference leads to robust condensate density beatings with periodic appearance of orderly arranged phase singularities. Our work opens new perspectives on creating structured free-evolving light, and singular optics in the strong light-matter coupling regime.
我们展示了在微腔激子-极化激元凝聚体中自发形成的非线性涡旋簇态，其拓扑电荷在吉赫兹尺度上具有时间周期性的符号翻转。当用环形非共振激光进行光泵浦时，捕获的凝聚体经历复杂的高阶模竞争，并分裂为两个不同的捕获能级。由此产生的模式干涉导致了稳健的凝聚体密度拍频，并周期性地出现有序排列的相位奇点。我们的工作为在强光-物质耦合 regime 中创建结构化自由演化光和奇异光学开辟了新的视角。
