Thirty years ago, Coullet et al. proposed that a special optical field exists in laser cavities
bearing some analogy with the superfluid vortex. Since then, optical vortices have been …

As an indispensable complement to an integer vortex beam, the fractional vortex beam has
unique physical properties such as radially notched intensity distribution, complex phase …

Structured light refers to the generation and application of custom light fields. As the tools
and technology to create and detect structured light have evolved, steadily the applications …

Exploiting a particular wave property for a particular application necessitates components
capable of discriminating in the basis of that property. While spectral or polarisation …

Optical photons are powerful carriers of quantum information, which can be delivered in free
space by satellites or in fibers on the ground over long distances. Entanglement of quantum …

Quantum light–matter interfaces are at the heart of photonic quantum technologies.
Quantum memories for photons, where non-classical states of photons are mapped onto …

Photons can carry angular momentum, not only due to their spin, but also due to their spatial
structure. This extra twist has been used, for example, to drive circular motion of microscopic …

We construct quantum error-correcting codes that embed a finite-dimensional code space in
the infinite-dimensional Hilbert space of rotational states of a rigid body. These codes, which …

The ability of light to carry and deliver orbital angular momentum (OAM) in the form of optical
vortices has attracted much interest. The physical properties of light with a helical wavefront …

Nonlinear beam shaping refers to spatial reconfiguration of a light beam at a new frequency,
which can be achieved by using nonlinear photonic crystals (NPCs). Direct nonlinear beam …