Vortex light beams are structures of the electromagnetic field with a spiral phase ramp
around a point-phase singularity. These vortices have many applications in the optical …

Laser beams carrying orbital angular momentum (OAM) have found major applications in a
variety of scientific fields, and their potential for ultrahigh-intensity laser-matter interactions …

We theoretically show that a single free electron in circular motion radiates an
electromagnetic wave possessing helical phase structure, which is closely related to orbital …

An X-ray is the well-known probe to examine structure of materials, including our own
bodies. The X-ray beam, especially at the wavelength of nanometers, has also become …

Extreme-ultraviolet vortices may be exploited to steer the magnetic properties of
nanoparticles, increase the resolution in microscopy, and gain insight into local symmetry …

Chirality is a structural property of molecules lacking mirror symmetry that has strong
implications in diverse fields, ranging from life sciences to materials science. Chirality …

X-ray beams carrying orbital angular momentum (OAM) are an emerging tool for probing
matter. Optical elements, such as spiral phase plates and zone plates, have been widely …

A method of using intense Laguerre–Gaussian (LG) laser pulse is proposed to generate
ultrarelativistic (multi-GeV) electron beams with controllable helical structures based on a …

We formulate a theoretical approach to describe photon vortex production in
synchrotron/cyclotron radiation from a helical moving electron under a uniform magnetic …

Vortex γ-ray beams with large orbital angular momentum (OAM) have significant potential
applications in material science, nuclear detection, and astrophysics. An all-optical scheme …