Exciton–polaritons—light–matter quasiparticles with spin degrees of freedom and ultrafast dynamics—are a promising platform for spin-based applications. However, an ongoing challenge is the generation and manipulation of high-purity polariton spins over macroscopic distances at room temperature. Here, by creating synthetic spin–orbit coupling in perovskite microcavities with liquid crystal molecules, we demonstrate the polariton spin Hall effect in the Rashba–Dresselhaus regime at room temperature, where spin-polarized polaritons with a high chirality of 0.88 are permanently separated as they propagate over 45 μm. We further show that their spin transport behaviours can be effectively manipulated by external electrical voltages. Our work represents an important step to generate purer polariton spin currents, paving the way to spin-optoelectronic applications with polaritons, such as spin lasers, spin filters and spin logic gates.

激子极化子（具有自旋自由度和超快动力学的光物质准粒子）是基于自旋的应用的一个有前途的平台。然而，一个持续的挑战是在室温下在宏观距离上产生和操纵高纯度极化子自旋。在这里，通过在钙钛矿微腔中与液晶分子创建合成自旋轨道耦合，我们证明了室温下 Rashba-Dresselhaus 体系中的极化子自旋霍尔效应，其中具有 0.88 高手性的自旋极化子在它们之间永久分离。传播超过 45 μm。我们进一步表明，它们的自旋输运行为可以通过外部电压有效操纵。我们的工作代表了产生更纯的极化子自旋电流的重要一步，为极化子的自旋光电应用（例如自旋激光器、自旋滤波器和自旋逻辑门）铺平了道路。