Position and Orientation Control of Complex-Shaped Samples in Acoustic Levitation

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Controlled levitation has been limited to sub-wavelength samples with few exceptions of spheres and cubes. We demonstrate controlled airborne levitation of 2λ-sized complex-shaped objects (3D letters, X, U, T). The pressure field was tailored to a particular sample shape by arranging multiple small asymmetric acoustic traps. This allows stable locking of the object and control of its orientation and position in mid-air. The pressure field was produced with a 450-element phased array (f = 40kHz) featuring element-wise amplitude and phase control.
Original languageEnglish
Title of host publication2022 IEEE International Ultrasonics Symposium (IUS)
Number of pages4
Publication date2022
ISBN (Print)978-1-6654-7813-7
ISBN (Electronic)978-1-6654-6657-8
Publication statusPublished - 2022
MoE publication typeA4 Article in conference proceedings
Event2022 IEEE International Ultrasonics Symposium (IUS) - Venice, Italy
Duration: 10 Oct 202213 Oct 2022

Fields of Science

  • 114 Physical sciences

Cite this