首页|Acoustic Bilayer Gradient Metasurfaces for Perfect and Asymmetric Beam Splitting
Acoustic Bilayer Gradient Metasurfaces for Perfect and Asymmetric Beam Splitting
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We experimentally and theoretically present a paradigm for the accurate bilayer design of gradient metasur-faces for wave beam manipulation,producing an extremely asymmetric splitting effect by simply tailoring the interlayer size.This concept arises from anomalous diffraction in phase gradient metasurfaces and the precise combination of the phase gradient in bilayer metasurfaces.Ensured by different diffraction routes in momentum space for incident beams from opposite directions,extremely asymmetric acoustic beam splitting can be generated in a robust way,as demonstrated in experiments through a designed bilayer system.Our work provides a novel approach and feasible platform for designing tunable devices to control wave propagation.
权家琪、孙宝印、伏洋洋、高雷、徐亚东
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Institute of Theoretical and Applied Physics,School of Physical Science and Technology,Soochow University,Suzhou 215006,China
College of Physics,Nanjing University of Aeronautics and Astronautics&Key Laboratory of Aerospace Information Materials and Physics(NUAA),MIIT,Nanjing 211106,China
School of Optical and Electronic Information,Suzhou City University,Suzhou 215104,China
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