From hyperbolic in-plane anisotropy to an optical chirality: A new route to nanoscale circular polarizers

In recent years, van der Waals crystals have evolved from scientific curiosities into a versatile platform for exploring novel quantum phases and unconventional nanophotonic phenomena. Their layered nature allows stacking, twisting and interfacing with a remarkable atomic precision, enabling previously inaccessible electronic, optoelectronic and photonic functionalities at the nanoscale.