Both classical and quantum waves can form vortices: entities with helical phase fronts and
circulating current densities. These features determine the intrinsic orbital angular …

Vortex states of photons, electrons, and other particles are non-plane-wave solutions of the
corresponding wave equation with helicoidal wave fronts. These states possess an intrinsic …

In this paper, ultra-thin metalenses are proposed to generate converging and non-diffractive
vortex beam carrying orbital angular momentum (OAM) in microwave region. Phase …

The recent prediction and subsequent creation of electron vortex beams in a number of
laboratories occurred after almost 20 years had elapsed since the recognition of the physical …

An electron vortex beam (EVB) carrying orbital angular momentum (OAM) plays a key role in
a series of fundamental scientific researches, such as chiral energy-loss spectroscopy and …

In the past decade, optical orbital angular momentum (OAM) has entered the field of
plasmonics in the form of surface-confined vortices, generating vast interest. Here we give …

This book deals with theoretical bases of the modern optics division concerned with
coherent light fields with singularities characterized by phase uncertainty. Singular light …

Light beams carrying orbital angular momentum are key resources in modern photonics. In
many applications, the ability to measure the complex spectrum of structured light beams in …

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 study of structured optical waves has enhanced our understanding of light and
numerous experimental methods now enable the control of the angular momentum and …