Monolayer Chiral Metasurface for Generation of Arbitrary Cylindrical Vector Beams

oleh: Qian Chen, Peijun Liu, Yanan Fu, Shuoshuo Zhang, Yuquan Zhang, Xiaocong Yuan, Changjun Min

Format: Article
Diterbitkan: MDPI AG 2024-01-01

Deskripsi

The cylindrical vector beam (CVB) has been widely studied and applied in recent years. However, many CVB generation methods suffer from complex systems, and large-size devices are required. Here, we propose a monolayer chiral metasurface composed of spin-sensitive unit cells which can generate different holograms for left- and right-circular polarization based on the combined modulation of geometric phase and detour phase. With a linearly polarized incident beam, the metasurface can generate CVBs with controllable polarization angles and orders, and even more complex vector beams. This work provides a new idea for the design of miniaturized optical devices for generating arbitrary vector beams.