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微纳人工结构与声超表面器件
Micro-nanoacoustic artificial structures and acoustic ultrasurface devices
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摘要:
基于人工结构和超表面实现精准、多维度、反常规的声场调控是目前物理学和材料科学领域的研究热点。与传统天然材料相比，声超材料和超表面具有功能可定制、复杂声场调控、尺寸集成和可兼容其他技术等显著优势。随着三维打印、光刻、激光切割等先进微纳加工技术的不断发展，人们可以精准灵活地控制人工结构单元的形貌尺寸，为实现高精准、功能定制的声场调控提供了更多自由度。文章介绍了几种高通量、亚波长厚度及结构平整的微纳人工结构和功能器件，包括基于微纳栅结构的声镊器件和基于超疏水微纳结构的超轻薄声学功能器件，它们以独特的声波操纵能力，未来有望在超声成像与治疗、微粒操控等领域获得重要的应用。最后讨论并展望了微纳人工结构与声超表面器件的研究趋势和发展前景。
Abstract:Realizing precise modulation of acoustic fields based on artificial structures and metasurfaces is currently a hot spot in the fields of physics and materials science. Compared to traditional natural materials, artificial structures offer significant advantages, including complex modulation, dimensional flexibility, and compact integration. With the ongoing advances in micro- and nano-fabrication technologies, such as 3-dimension printing, photolithography, laser cutting, and etching, it is now possible to achieve more precise and flexible control over the morphology and geometry of structural unit-cells. This provides many more means to achieve efficient and accurate modulation of acoustic fields. This article introduces several highly efficient, compact micro-nano artificial structures and devices, including the meta-grating-based acoustic tweezers, and super-hydrophobic ultra-thin lightweight acoustic devices. These innovations are anticipated to have diverse applications in the fields of ultrasonic imaging and therapy, as well as particle manipulation, due to their unique acoustic wave manipulation capabilities. Finally, we discuss the future trends and prospects of these structures for metamaterials and metasurface-based acoustic devices.
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