Acoustic levitation uses acoustic radiation forces to counteract gravity and suspend objects
in mid-air. Although acoustic levitation was first demonstrated almost a century ago, for a …

Mid-air acoustic levitation is becoming a powerful tool to suspend and manipulate millimetric
objects. Because of its unique characteristics, acoustic levitation is suitable to trap a wide …

Acoustic levitation has the potential to enable novel studies due to its ability to hold a wide
variety of substances against gravity under container-less conditions. It has found …

Modern ultrasonic phased-array controllers are electronic systems capable of delaying the
transmitted or received signals of multiple transducers. Configurable transmit-receive array …

Ultrasound haptics is a contactless haptic technology that enables novel mid-air interactions
with rich multisensory feedback. This article surveys recent advances in ultrasound haptic …

Abstract Space-coiling acoustic metasurfaces have been largely exploited and shown their
outstanding wave manipulation capacity. However, they are complex in realization and …

We report the optimal focusing of acoustic vortex beams by using flat lenses based on a
Fresnel-spiral diffraction grating. The flat lenses are designed by spiral-shaped Fresnel zone …

The ability to shape ultrasound fields is important for particle manipulation, medical
therapeutics, and imaging applications. If the amplitude and/or phase is spatially varied …

Acoustic and elastic metamaterials are media with a subwavelength structure that behave as
effective materials displaying atypical effective dynamic properties. These material systems …

In previous studies, acoustical levitation in the far-field was limited to particles. Here, this
paper proposes the “boundary hologram method,” a numerical design technique to generate …