Acoustic vortices provide a single-beam approach to manipulate objects with sizes from
nanometers to millimeters, gaining increasing interest in recent years. The helical beam …

Long-range acoustic communication is crucial to underwater applications such as collection
of scientific data from benthic stations, ocean geology, and remote control of off-shore …

Studies on radiation pressure in acoustics and optics have enriched one another and have a
long common history. Acoustic radiation pressure is used for metrology, levitation, particle …

Unlike optical waves, acoustic waves in fluids are described by scalar pressure fields, and
therefore are considered spinless. Here, we demonstrate experimentally the existence of …

An acoustic vortex in an inviscid fluid and its radiation torque on an axisymmetric absorbing
object are analyzed beyond the paraxial approximation to clarify an analogy with an optical …

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

Propagation-invariant or nondiffracting optical beams have received considerable attention
during the last two decades. However, the pulsed nature of light waves and the structured …

Space–time light structuring has emerged as a very powerful tool for controlling the
propagation dynamics of pulsed beams. The ability to manipulate and generate space–time …

An imaging technique is here proposed to overcome the classical “diffraction limit” by using
helical beams. This technique and the analysis presented are valid for all kinds of waves …

We identify an acoustic process in which the conversion of angular momentum between its
spin and orbital form takes place. The interaction between an evanescent wave propagating …