The quantum Hall effect involves electrons confined to a two-dimensional plane subject to a perpendicular magnetic field, but it also has a photonic analogue^1,2,3,4,5,6. Using heterostructures based on structured semiconductors on a magnetic substrate, we introduce compact and integrated coherent light sources of large orbital angular momenta⁷ based on the photonic quantum Hall effect^1,2,3,4,5,6. The photonic quantum Hall effect enables the direct and integrated generation of coherent orbital angular momenta beams of large quantum numbers from light travelling in leaky circular orbits at the interface between two topologically dissimilar photonic structures. Our work gives direct access to the infinite number of orbital angular momenta basis elements and will thus enable multiplexed quantum light sources for communication and imaging applications.

量子霍尔效应涉及受限于受垂直磁场影响的二维平面的电子，但它也具有光子模拟^1,2,3,4,5,6。使用基于磁性衬底上的结构化半导体的异质结构，我们引入了基于光子量子霍尔效应^{1、2、3、4、5、6的大轨道角动量7}的紧凑和集成相干光源. 光子量子霍尔效应能够从在两个拓扑不同的光子结构之间的界面处的泄漏圆形轨道中传播的光中直接和集成生成大量子数的相干轨道角动量束。我们的工作可以直接访问无限数量的轨道角动量基元素，从而使多路复用量子光源能够用于通信和成像应用。