[1] [1] CUMMER S A, CHRISTENSEN J, AL A. Controlling sound with acoustic metamaterials［J］. Nature Reviews Materials, 2016, 1(3): 1-13.

[4] [4] LIU T, MA G C, LIANG S J, et al. Single-sided acoustic beam splitting based on parity-time symmetry［J］. Physical Review B, 2020, 102: 014306.

[5] [5] HAN X K, ZHANG Z. Acoustic beam controlling in water by the design of phononic crystal［J］. Extreme Mechanics Letters, 2020, 34: 100602.

[6] [6] BUCAY J, ROUSSEL E, VASSEUR J O, et al. Positive, negative, zero refraction, and beam splitting in a solid/air phononic crystal: theoretical and experimental study［J］. Physical Review B, 2009, 79(21): 214305.

[7] [7] GRACI-SALGADO R, GARCA-CHOCANO V M, TORRENT D, et al. Negative mass density and ρ-near-zero quasi-two-dimensional metamaterials: design and applications［J］. Physical Review B, 2013, 88(22): 224305.

[8] [8] YAN X X, WEI W, HU N, et al. Splitting of acoustic energy by zero index metamaterials［J］. Physics Letters A, 2015, 379(37): 2147-2149.

[9] [9] EPSTEIN A, ELEFTHERIADES G V. Synthesis of passive lossless metasurfaces using auxiliary fields for reflectionless beam splitting and perfect reflection［J］. Physical Review Letters, 2016, 117(25): 256103.

[10] [10] WANG X C, DAZ-RUBIO A, TRETYAKOV S A. Independent control of multiple channels in metasurface devices［J］. Physical Review Applied, 2020, 14(2): 024089.

[11] [11] ASADCHY V S, DAZ-RUBIO A, TCVETKOVA S N, et al. Flat engineered multichannel reflectors［J］. Physical Review X, 2017, 7(3): 031046.

[12] [12] KWON D H, TRETYAKOV S A. Perfect reflection control for impenetrable surfaces using surface waves of orthogonal polarization［J］. Physical Review B, 2017, 96(8): 085438.

[13] [13] WANG K, SHAO W, DING X, et al. Design method of passive lossless metasurfaces with auxiliary waves for beam control［J］. IEEE Transactions on Antennas and Propagation, 2020, 68(5): 4126-4131.

[14] [14] FANG X S, WANG X, LI Y. Acoustic splitting and bending with compact coding metasurfaces［J］. Physical Review Applied, 2019, 11(6): 064033.

[15] [15] XU Y L, CAO L Y, PENG P, et al. Beam splitting of flexural waves with a coding meta-slab［J］. Applied Physics Express, 2019, 12(9): 097002.

[16] [16] CAO S T, HOU Z L. Angular-asymmetric transmitting metasurface and splitter for acoustic waves: combining the coherent perfect absorber and a laser［J］. Physical Review Applied, 2019, 12(6): 064016.

[17] [17] FU Y Y, TAO J Q, SONG A L, et al. Controllably asymmetric beam splitting via gap-induced diffraction channel transition in dual-layer binary metagratings［J］. Frontiers of Physics, 2020, 15(5): 1-6.

[18] [18] NI H Q, FANG X S, HOU Z L, et al. High-efficiency anomalous splitter by acoustic meta-grating［J］. Physical Review B, 2019, 100(10): 104104.

[19] [19] DAZ-RUBIO A, LI J F, SHEN C, et al. Power flow-conformal metamirrors for engineering wave reflections［J］. Science Advances, 2019, 5(2): eaau7288. DOI:10.1126/sciadv.aau7288.

[20] [20] LI J F, SONG A L, CUMMER S A. Bianisotropic acoustic metasurface for surface-wave-enhanced wavefront transformation［J］. Physical Review Applied, 2020, 14(4): 044012.

[21] [21] LI J F, SHEN C, DAZ-RUBIO A, et al. Systematic design and experimental demonstration of bianisotropic metasurfaces for scattering-free manipulation of acoustic wavefronts［J］. Nature Communications, 2018, 9: 1342.

[22] [22] LI J F, DAZ-RUBIO A, SHEN C, et al. Highly efficient generation of angular momentum with cylindrical bianisotropic metasurfaces［J］. Physical Review Applied, 2019, 11(2): 024016.