In this work, we give direct demonstration of acoustic radiation force and acoustic torque on
particles exerted by an acoustic vortex beam, which is realized by an acoustic artificial …

The formation of high-order Bessel beams by a passive acoustic device consisting of an
Archimedes' spiral diffraction grating is theoretically, numerically, and experimentally …

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 …

We report zero-th and high-order acoustic Bessel beams with broad depth-of-field generated
using acoustic holograms. While the transverse field distribution of Bessel beams generated …

Acoustic streaming, which is the unidirectional movement of a medium driven by its internal
intense acoustic vibrations, has been known for more than a century. Despite the long …

Compared with conventional methods that require electric manipulation of the transducer,
passive diffraction gratings provide a simpler and more compact solution to generate an …

In this paper, a double-layer acoustic metasurface (DAM) composed of a fixed lower
acoustic metasurface (LAM) and a rotatable upper acoustic metasurface (UAM) is proposed …

Abstract Spatiotemporal Optical Vortices (STOVs) are structured electromagnetic fields
propagating in free space with phase singularities in the space-time domain. Depending on …

Acoustic vortices have attracted a great deal of attention in recent years due to their
numerous applications. We introduce a highly efficient method for the generation of acoustic …

We present a simple and efficient method for generating focused acoustic vortices in air over
a wide range of ultrasonic frequencies by means of an Active-Spiral Fresnel Zone Plate. An …