Solid-state spin sensors have the capacity to act as quantum microscopes for probing material properties and physical processes. However, so far, these tools have relied on quantum defects hosted in rigid, three-dimensional (3D) crystals such as diamond, limiting their ability to closely interface with the sample. Here we demonstrate a versatile quantum microscope using point defects embedded within a thin layer of the van der Waals material hexagonal boron nitride. To showcase the multi-modal capabilities of this platform, we assemble two different heterostructures of a van der Waals material in combination with a quantum-active boron nitride flake. We demonstrate time-resolved, simultaneous temperature and magnetic imaging near the Curie temperature of a van der Waals ferromagnet, as well as map out charge currents and Joule heating in an operating graphene device. The straightforward integration of the hexagonal boron nitride quantum sensor with other van der Waals materials will yield substantial practical benefits for the design and measurement of 2D devices.

固态自旋传感器具有作为量子显微镜探测材料特性和物理过程的能力。然而，到目前为止，这些工具依赖于金刚石等刚性三维 (3D) 晶体中的量子缺陷，从而限制了它们与样品紧密接触的能力。在这里，我们展示了一种多功能量子显微镜，它使用嵌入在范德华材料六方氮化硼薄层中的点缺陷。为了展示该平台的多模态能力，我们将范德华材料的两种不同异质结构与量子活性氮化硼薄片组合在一起。我们展示了范德华铁磁体居里温度附近的时间分辨、同时温度和磁成像，以及绘制运行中的石墨烯器件中的充电电流和焦耳热。六方氮化硼量子传感器与其他范德华材料的直接集成将为二维器件的设计和测量带来巨大的实际好处。