  In this work, we develop the gradient metasurface is constructed of a locally
anisotropic resonant structure, comprising a steel cylinder with an elliptical
rubber coating embedded in epoxy. The deflective angles of rubber ellipses in
the locally anisotropic resonant unit provide a method of controlling the
reflected phase. Phase shifts of the reflected wave can cover the 2pi range.
With an appropriate design of the phase profiles along the acoustic
metasurface, we can achieve anomalous reflection and Bessel beam. The locally
anisotropic resonant units have significant potential for engineering and
manipulating acoustic wavefronts
