Controlling acoustic orbital angular momentum with artificial structures:From physics to application  

作　　者：Wei Wang Jingjing Liu Bin Liang Jianchun Cheng 王未;刘京京;梁彬;程建春(Key Laboratory of Modern Acoustics,MOE,Institute of Acoustics,Department of Physics,Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China)

机构地区：[1]Key Laboratory of Modern Acoustics,MOE,Institute of Acoustics,Department of Physics,Collaborative Innovation Center of Advanced Microstructures,Nanjing University,Nanjing 210093,China

出　　处：《Chinese Physics B》2022年第9期41-55,共15页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2017YFA0303700);the National Natural Science Foundation of China(Grant Nos.11634006 and 81127901);the Fund from the High-Performance Computing Center of Collaborative Innovation Center of Advanced Microstructures;the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

摘　　要：Acoustic orbital angular momentum(OAM)associated with helicoidal wavefront recently attracts rapidly-growing attentions,offering a new degree of freedom for acoustic manipulation.Due to the unique dynamical behavior and inherent mode orthogonality of acoustic OAM,its harnessing is of fundamental interests for wave physics,with great potential in a plethora of applications.The recent advance in materials physics further boosts efforts into controlling OAM-carrying acoustic vortices,especially acoustic metasurfaces with planar profile and subwavelength thickness.Thanks to their un-conventional acoustic properties beyond attainable in the nature,acoustic artificial structures provide a powerful platform for new research paradigm for efficient generation and diverse manipulation of OAM in ways not possible before,enabling novel applications in diverse scenarios ranging from underwater communication to object manipulation.In this article,we present a comprehensive view of this emerging field by delineating the fundamental physics of OAM-metasurface interac-tion and recent advances in the generation,manipulation,and application of acoustic OAM based on artificial structures,followed by an outlook for promising future directions and potential practical applications.

关 键 词：acoustic orbital angular momentum acoustic metamaterials acoustic metasurfaces acoustic communications 

分 类 号：O42[理学—声学]