Fan, TongmiaoTongmiaoFanTang, YilinYilinTangLung, ShaunShaunLungWeissflog, MaximilianMaximilianWeissflogMa, JinyongJinyongMaShinde, SaniyaSaniyaShindeSaravi, SinaSinaSaraviNauman, MudassarMudassarNaumanYang, WenkaiWenkaiYangQin, HaoHaoQinQiu, ShuyaoShuyaoQiuSukhorukov, Andrey A.Andrey A.SukhorukovLu, YueruiYueruiLuSetzpfandt, FrankFrankSetzpfandt2025-10-012025-10-012025https://publica.fraunhofer.de/handle/publica/49656710.1109/CLEO/EUROPE-EQEC65582.2025.111105252-s2.0-105016175231Photon pairs generated by spontaneous parametric down-conversion (SPDC) are playing a pivotal role in many quantum applications such as quantum computing, quantum imaging and quantum communication. Metasurfaces, which are two-dimensional arrays of nanostructures, have been studied intensively to enhance SPDC and provide additional functionalities over the bulky optical systems [1]. Van der Waals (vdWs) layered materials have emerged as promising platform for quantum light sources, owing to their unique properties [2,3]. For example, vdWs materials offer high refractive index, a high nonlinear susceptibility, and compatibility with on-chip integration.enfalseconference paper