Spin-locked achromatic meta-deflector with wideband and high-efficiency

A broadband achromatic reflective metasurface is proposed. For the right-handed circular polarized wave, the reflected wave could keep the same chiral. The abnormal reflection angle is able to hold at 32° from 9.5GHz to 11.5GHz, corresponding of the relative bandwidth 19.02%. The work efficiencies can keep over 70% and the peak could reach to 83%. The designed metasurface can be applied to the antenna arrays and communication systems.