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Published on: May 9, 2021
Midair Single-Sided Acoustic Levitation in High-Pressure Regions of Zero-Order Bessel Beams
Yusuke Koroyasu1, Christopher Stone2, Yoichi Ochiai3,4,5,6
1University of Tsukuba, Graduate School of Comprehensive Human Science, Tsukuba, Ibaraki 305-8550, Japan.
Abstract:
Acoustic levitation enables noncontact manipulation using sound waves. While conventional methods entrap particles at pressure nodes (zero-pressure region surrounded by high pressure), we demonstrate stable acoustic levitation and translation in midair within a high-pressure axial core of a zero-order Bessel beam for the first time. The trap operates at a long working distance, up to 397 mm (46.6λ), supports simultaneous multiparticle levitation, and maintains stability over obstacles. Our work establishes a new paradigm for single-sided acoustic manipulation in midair.
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