Spontaneously coherent orbital coupling of counterrotating exciton polaritons in annular perovskite microcavities

• 作者: Jun Wang Huawen Xu Rui Su Yutian Peng Jinqi Wu Timothy C.H.Liew Qihua Xiong
• 来源期刊: 光：科学与应用（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Articles
• 页码范围: 401-408
• 页数: 8页
• 语种: 英文

摘要

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 lobenumbers 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 alternatingπphase 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.