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看不见的“手”——声辐射力及其应用

An invisible hand——acoustic radiation force and its applications

  • 摘要: 声波是在弹性介质中传播的经典机械波。当声波在物体表面发生反射、折射、散射等效应时,会与物体产生动量与能量的交换。这种交换在宏观上表现为声波对物体施加力的作用,称为声辐射力,瑞利和朗之万两位科学家正是声辐射力的最早发现者。经过一百多年的探索,声辐射力的基本理论和研究方法已经得到极大的丰富和发展,成为声学的前沿与热点问题。与此同时,在生物医学、材料科学、纳米科学等领域,基于声辐射力的无损精准操控技术正受到越来越多的关注,展现出巨大的应用前景。

     

    Abstract: Acoustic waves are classical mechanical waves that propagate in an elastic medium. When they reflect, refract and scatter on the surface of objects, momentum and energy exchange will be generated, which is manifested as a force exerted on the object macroscopically, called the acoustic radiation force. Two scientists, Rayleigh and Langevin, first discovered the phenomenon of acoustic radiation force. Through the exploration of more than one hundred years, the fundamental theories and investigations of acoustic radiation forces have been greatly enriched and developed, becoming the frontier issues of acoustics. Meanwhile, in the fields of biomedicine, material science and nanoscience, the non-destructive precise manipulation technology based on acoustic radiation force is receiving increasing attention, showing great prospects in real applications.

     

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