Robust realization of electrically tunable spin-orbit locked vortex pairs in polariton condensates at room temperature

Coupling of orbital and spin degrees of freedom gives rise to intriguing physical phenomena in bosonic condensates, such as formation of stripe phases and domains with vortex arrays. However, the robust locking of spin and orbital degrees of freedom of nonlinear topological objects such as vortices in bosonic condensates at room temperature remains challenging. In the present work, we realize a non-equilibrium room-temperature condensate in a liquid crystal (LC) planar photonic microcavity with the perovskite CsPbBr3 as optically active material. We use the interplay of TE-TM mode splitting and Rashba-Dresselhaus spin-orbit coupling (RDSOC) to realize electrically tunable polariton vortex pairs with locked spin and orbital angular momentum. Our results are robust against sample imperfections and pave the way to investigate coupling and locking of vortex orbital and spin degrees of freedom in a quantum fluid of light at room temperature, offering potential for generation of complex states of light for optical information processing with optoelectronic chips.