Lamb waves manipulation by piezoelectric metasurface with tunable diffraction orders

In this paper, a piezoelectric metasurface is proposed to manipulate the anti-symmetric mode Lamb wave by altering diffraction order. The attached host plate symmetrically arranged out-of-plane polarized patches connected with synthetic inductance circuits. Without changing physical configuration, transmitted phase of can be shifted arbitrarily in 0 ∼ 2 π range metasurface. Furthermore, relationship between gradient and order investigated, different orders waves obtained adjusting shunting symmetric transmission asymmetric from couple axis incident realized utilizing +1st-order −1st-order diffraction. Moreover, omnidirectional reflection trapping channelized waveguides also 0th-order results indicate that has great potentials manipulating guided large angle isolating propagation.