Field-programmable acoustic array for patterning micro-objects
Field-programmable acoustic array for patterning micro-objects
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DOI：
10.1063/5.0003147
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发表时间：
2020-04
影响因子：
4
通讯作者：
K. Tung;P. Chiou
中科院分区：
文献类型：
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作者：
K. Tung;P. Chiou
介绍了一种现场可编程声学平台，以实现将微对象重新配置为具有亚波长分辨率的复杂的非周期形状。由于器件结构的限制，传统的声学方法很难实现对势能分布的通用调整。为了应对这样的挑战，我们提出了一种数字可编程的近场声学平台，它允许生成多功能的潜在轮廓。该平台使用一组充满水介质的空腔，这些空腔可以被激光选择性地汽化，以形成平面波声波的波前，从而形成声势分布。我们已经展示了一个数字像素分辨率为40μm螺距的现场可编程声学平台。用17 mW、532 nm的激光，可以1腔/S的速率产生一个空气腔。
A field-programmable acoustic platform is introduced to enable re-configurable patterning of micro-objects into complex and non-periodic shapes with sub-wavelength resolution. Conventional acoustic methodologies are difficult in realizing versatile adjustments of potential energy profiles due to the constraint of the device structure. To tackle such a challenge, we present a digitally programmable, near-field acoustic platform that permits the generation of versatile potential profiles. This platform uses an array of aqueous-medium filled cavities that can be selectively vaporized by a laser beam to pattern the acoustic wavefront of a plane wave to shape acoustic potential profiles. We have demonstrated a field-programmable acoustic platform with a digital pixel resolution of 40 μm pitch. With a 17 mW, 532 nm laser, an air cavity can be generated at a rate of 1 cavity/s.