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 …

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

Interest in the multiple facets of optical vortices has flourished in the last three decades. This
review examines the basic research and applications of the interplay between optical …

Traditional photonuclear reactions primarily excite giant dipole resonances, making the
measurement of isovector giant resonances with higher multipolarities a great challenge. In …

Solving Maxwell's equations in cylindrical coordinates yields states in quantum theory with
definite values of energy ℏω, longitudinal momentum ℏk z, and total angular momentum …

Recent advances in the production and control of high-brightness electron beams (e-beams)
have enabled a new class of intense light sources based on the free electron laser (FEL) …

We analyze the multipole excitation of atoms with twisted light, ie, by a vortex light field that
carries orbital angular momentum. A single trapped 40 Ca+ ion serves as a localized and …

This Letter presents for the first time a scheme to generate intense high-order optical vortices
that carry orbital angular momentum in the extreme ultraviolet region based on relativistic …

Inverse Thomson scattering is a well-known radiation process that produces high-energy
photons both in nature and in the laboratory. Nonlinear inverse Thomson scattering …

In this paper, we have performed experimental, analytical, and numerical studies of beams
with topological charges of±1 and±2 formed by silicon binary phase axicons (BPAs) with …