Far-field and near-field wavefront manipulations enabled by metasurfaces

We propose a novel method for high efficiency wavefront control by utilizing insulator-metal and metal-insulator-metal metamaterial. Based on such method, high efficiency anomalous reflection and planar focus lens are achieved in microwave region. Moreover, we demonstrate that such wavefront control can also be used in near-field optics with realizing an almost perfect the conversion of propagating waves into surface waves.