We demonstrate the formation and trapping of different stationary solutions, oscillatory solutions, and rotating solutions of a polariton condensate in a planar semiconductor microcavity with a built-in ring-shaped potential well. Multistable ring-shaped solutions are trapped in shallow potential wells. These solutions have the same ring-shaped density distribution but different topological charges, corresponding to different orbital angular momentum (OAM) of the emitted light. For stronger confinement potentials, besides the fundamental modes, higher excited (dipole) modes can also be trapped. If two modes are excited simultaneously, their beating produces a complex oscillation or rotation dynamics. When the two modes have the same OAM, a double-ring solution forms for which the density oscillates between the inner and the outer ring. When the two modes have different OAM, a rotating solution with fractional OAM is created.

中文翻译：

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极化电势中捕获的极化子冷凝物的多稳态圆形电流。

我们展示了具有固定环形势阱的平面半导体微腔中极化子冷凝物的不同固定溶液，振荡溶液和旋转溶液的形成和捕获。多稳态环形溶液被困在浅势阱中。这些解决方案具有相同的环形密度分布，但具有不同的拓扑电荷，对应于所发射光的不同轨道角动量（OAM）。为了获得更强的约束电位，除了基本模式之外，还可以捕获更高的激发（偶极子）模式。如果同时激发两种模式，则它们的跳动会产生复杂的振荡或旋转动力学。当两种模式具有相同的OAM时，会形成双环解决方案，密度在内部和外部环之间振荡。