The article comments on a recently reported OAM comb. proposed approach relies simple azimuthal binary phase modulation scheme to transform Gaussian beam into structured light containing multiple components with equal spacing and uniform power. It provides convenient way simultaneously tailor channels, the potential impact many fields, including optical information technology.

Entanglement of the properties of two separated particles constitutes a fundamental signature of quantum mechanics and is a key resource for quantum information science. We demonstrate strong Einstein, Podolsky, and Rosen correlations between the angular position and orbital angular momentum of two photons created by the nonlinear optical process of spontaneous parametric down-conversion. The d...

In the past decade, optical orbital angular momentum (OAM) has entered field of plasmonics in form surface-confined vortices, generating vast interest. Here we give an overview field, starting with pioneering analytic and experimental investigations plasmonic OAM. We describe advances leading to study suboptical cycle dynamics time-resolved experiments investigation light–matter interactions th...

Deeply inelastic scattering experiments contradict the notion that the proton’s spin is the sum of the spins of the quarks. The s-wave non-relativistic bound state picture of the proton has then been ruled out. Consequently there is great interest in the orbital angular momentum of quarks and the spin of gluons. While the spin of gluons is difficult to define gauge invariantly, the orbital angu...

Twenty-five years ago Allen, Beijersbergen, Spreeuw, and Woerdman published their seminal paper establishing that light beams with helical phase-fronts carried an orbital angular momentum. Previously orbital angular momentum had been associated only with high-order atomic/molecular transitions and hence considered to be a rare occurrence. The realization that every photon in a laser beam could ...

Orbital angular momentum of light is a fundamental optical degree of freedom characterized by unlimited number of available angular momentum states. Although this unique property has proved invaluable in diverse recent studies ranging from optical communication to quantum information, it has not been considered useful or even relevant for simulating nontrivial physics problems such as topologic...