A few years ago the possibility of coupling and inter-converting the spin and orbital angular
momentum (SAM and OAM) of paraxial light beams in inhomogeneous anisotropic media …

We theoretically study ghost imaging with incoherent and partially coherent light radiation by
using classical optical coherence theory. A Gaussian thin lens equation is derived for the …

In analogy with Bell's inequality for two-qubit quantum states, we propose an inequality
criterion for the nonseparability of the spin-orbit degrees of freedom of a laser beam. A …

We demonstrate the spin to orbital angular momentum transfer in frequency upconversion
with structured light beams. A vector vortex is coupled to a circularly polarized Gaussian …

We investigate the nonlinear mixing of orbital angular momentum in type-II second-harmonic
generation with arbitrary topological charges imprinted on two orthogonally polarized …

In this paper we investigate the quantum noise properties of polarization vortices in
connection with an intensity-based Clauser-Horne-Shimony-Holt (CHSH) inequality for their …

We discuss the use of the transverse spatial degrees of freedom of photons propagating in
the paraxial approximation for continuous-variable information processing. Given the wide …

It is possible to prepare classical optical beams which cannot be characterized by a tensor
product of vectors describing each of their degrees of freedom. Here we report the …

We demonstrate second harmonic generation performed with optical vortices with different
topological charges imprinted on orthogonal polarizations. Besides the intuitive charge …

We describe continuous-variable hyperentanglement in polarization and orbital angular
momentum modes of an optical parametric oscillator. The quantum stochastic equations for …