This study was published in Optica. Polarization—the orientation of light waves—is a cornerstone of modern technology, critical in everything from next-generation wireless communications to ...

"Despite being metallic, due to the chemistry and structure of these systems, different layer stackings can have built-in electric polarization, i.e., interlayer electric field and charge imbalance.

Simultaneous control of both direction and polarization, however, has never been achieved. In their paper "Unidirectional chiral emission via twisted bi-layer metasurfaces", Associate Prof Wu and ...