Dimensionality-enhanced mid-infrared light vortex detection based on multilayer graphene.

Recent conceptual demonstrations of direct photocurrent readout of light vortices have enabled the development of light orbital angular momentum-sensitive focal plane arrays and on-chip integration of orbital angular momentum detection. However, known orbital angular momentum-sensitive materials are limited to two topological Weyl Semimetals belonging to the C point group, namely, WTe and TaIrTe. Both are fragile under ambient conditions and challenging for large-scale epitaxial growth.