The aim of this contribution is to exploit composite vortex theory to manipulate the beam reflected by a single metasurface. In particular, by structuring the metasurface for reflecting both a vortex and a vortex-free component, its scattering pattern can be tailored according to the amplitude and phase of the two components. Full-wave numerical simulations confirm the effectiveness of the proposed approach, which could find applications for beam-shaping at different frequency ranges.
Barbuto, M., Bassotti, A., Alu, A., Bilotti, F., Toscano, A. (2021). Designing reflective metasurfaces by exploiting composite vortex theory. In 2021 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, APS/URSI 2021 - Proceedings (pp.877-878). Institute of Electrical and Electronics Engineers Inc. [10.1109/APS/URSI47566.2021.9704367].