Abstract

Metasurfaces with orthogonal nano-slit pairs arranged on spirals are proposed to generate vector beams (VBs) of Bell-like states and slanted polarizations. The design of the metasurfaces is based on the theoretically derived parameter condition for manipulation of the two vector vortex modes, which is satisfied by matching the three parameters of rotation order $m$, the spiral order $n$, and incident polarization helicity $\sigma$. The linear polarization states of the VBs are controlled by the initial orientation angle ${\varphi _0}$ of slit pairs. VBs of satisfying quality are experimentally obtained, with the analytical and simulated results validated.

© 2021 Optical Society of America

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