Ultra-broadband and high-efficiency polarization conversion metasurface with multiple plasmon resonance modes

Dong Guo-Xiang^{1, 2}, Shi Hong-Yu², Xia Song^{1, 2, †,}, Li Wei^{1, 2}, Zhang An-Xue¹, Xu Zhuo^{1, 2}, Wei Xiao-Yong^{1, 2}

Frequency-dependent reflected amplitudes for an incident wave polarized along (a) the v axis and (b) the u axis of the metasurface.