Exciton-polariton condensation is regarded as a spontaneous macroscopic quantum phenomenon with phase ordering and collective coherence. By engineering artificial annular potential landscapes in halide perovskite semiconductor microcavities, we experimentally and theoretically demonstrate the room-temperature spontaneous formation of a coherent superposition of exciton-polariton orbital states with symmetric petal-shaped patterns in real space, resulting from symmetry breaking due to the anisotropic effective potential of the birefringent perovskite crystals. The lobe numbers of such petal-shaped polariton condensates can be precisely controlled by tuning the annular potential geometry. These petal-shaped condensates form in multiple orbital states, carrying locked alternating π phase shifts and vortex–antivortex superposition cores, arising from the coupling of counterrotating exciton-polaritons in the confined circular waveguide. Our geometrically patterned microcavity exhibits promise for realizing room-temperature topological polaritonic devices and optical polaritonic switches based on periodic annular potentials.

激子-极化子凝聚被认为是具有相序和集体相干性的自发宏观量子现象。通过在卤化物钙钛矿半导体微腔中工程化人工环形势能景观，我们在实验上和理论上证明了在室温下自发形成的激子-极化子轨道态在实际空间中具有对称的花瓣形图案的相干叠加，这是由于电子的对称性破坏所致。双折射钙钛矿晶体的各向异性有效电势。通过调节环形势能几何形状，可以精确地控制这种花瓣形极化子凝结的波瓣数。这些花瓣状的冷凝物以多个轨道状态形成，带有锁定的交替π相移和涡旋-反涡旋叠加核，由有限的圆形波导中反向旋转的激子-极化子的耦合引起。我们的几何图案化微腔展示出有望实现基于周期性环形电势的室温拓扑极化子设备和光学极化子开关。