Abstract In this study, we show that fine manipulation of sound waves can be achieved through lossy acoustic gradient-index metasurfaces by utilizing the energy losses. This work, provides a practical route for achieving independent and arbitrary modulation of the amplitude and phase of sound. We demonstrate this mechanism by producing broadband high-quality airy beams. Furthermore, we realize the multifocal focusing based on this lossy acoustic gradient-index metasurfaces. Our findings increase the freedom and flexibility of the control of sound transmission.

中文翻译：

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通过有损声学梯度指数超表面的宽带高质量空气光束

摘要 在这项研究中，我们表明可以通过利用能量损失的有损声学梯度指数超表面来实现对声波的精细操纵。这项工作为实现声音的幅度和相位的独立和任意调制提供了一条实用途径。我们通过产生宽带高质量通风光束来证明这种机制。此外，我们实现了基于这种有损声学梯度指数超表面的多焦点聚焦。我们的发现增加了控制声音传输的自由度和灵活性。