Chunying Guan

Apr 1, 2024 | opg.optica.org | Chunying Guan |Wenjia Li |Wenxia Xu |Yehan Wang |Jinhui Shi

We introduce the concept of polarized vortex Smith–Purcell radiation by the interaction of an electron beam and cascaded metasurfaces. The spin and orbital angular momenta of Smith–Purcell radiation are determined by the cascaded metasurface that consists of a grating and a phase gradient metasurface. The grating converts the electron beam radiation into the desired polarized light, while the phase gradient metasurface generates the vortex light.