This article reviews recent progress leading to the generation of optical vortex beams. After
introducing the basics of optical vortex beams and their promising applications, we …

Recent advances in the research of vortex beams, structured beams carrying orbital angular
momentum (OAM), have revolutionized the applications of light beams, such as advanced …

Quantum metrology is one of the most promising applications of quantum technologies. The
aim of this research field is the estimation of unknown parameters exploiting quantum …

The linear Doppler shift is widely used to infer the velocity of approaching objects, but this
shift does not detect rotation. By analyzing the orbital angular momentum of the light …

" This engagingly written text provides a useful pedagogical introduction to an extensive
class of geometrical phenomena in the optics of polarization and phase, including simple …

As they travel through space, some light beams rotate. Such light beams have angular
momentum. There are two particularly important ways in which a light beam can rotate: if …

Publisher Summary This chapter discusses the orbital angular momentum of light, outlines
the theoretical basis for the orbital angular momentum of beams within the paraxial …

Publisher Summary The widespread availability of spatially and temporally coherent laser
sources makes the production of optical vortices inevitable in any experiment involving …

Entangled photon pairs are a critical resource in quantum communication protocols ranging
from quantum key distribution to teleportation. The current workhorse technique for …

Some 16 years ago, Allen et al.[Phys. Rev. A 45, 8185 (1992)] recognised that laser beams
which carried an angular momentum additional to photon spin, could be realized in the …