摘要
声学全息成像是将入射声波投射到成像平面,形成预设计的二维像。我们利用时间反转技术计算出全息平面所需要的振幅和相位轮廓。随后,我们设计了声学超材料来对反射声波进行空间的振幅相位调制。我们设计的声学超材料单元具有同时和独立地调控振幅和相位的功能。这种声学全息方法可能在超声治疗,粒子操控,和立体声场重建有潜在应用
Acoustic hologram is projecting the incident wave into image plane to form predesigned image. We use time-reversal technique calculated the required amplitude and phase profiles in hologram plane. Then, we design acoustic metamaterials to modulate the spatial amplitude and phase for reflected acoustic wave. The unit cells in our designed acoustic metamaterial can modulated the amplitude and phase simultaneously and independently. This method may have potential applications in ultrasonic therapy, particle trapping, and stereo sound field reconstruction.
引文
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