Qun-Hao Zhang

Low-divergence and low-sidelobe orbital angular momentum generation enabled by a modulated metasurface.

In this Letter, a low-divergence, low-sidelobe circularly polarized (CP) vortex emitter is proposed to generate a high-gain orbital angular momentum (OAM) beam of mode +l. Its leaky-wave radiation arises from the interaction between a bound surface wave and the spatially varying patches. A direct aperture field synthes...