Optically variable devices (OVDs) are in tremendous demand as optical indicators against
the increasing threat of counterfeiting. Conventional OVDs are exposed to the danger of …

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 …

Simultaneous manipulation of multiple degrees of freedom of light lies at the heart of
photonics. Nonlinear wavefront shaping offers an exceptional way to achieve this goal by …

The full manipulation of intrinsic properties of electromagnetic waves has become the
central target in various modern optical technologies. Optical metasurfaces have been …

Symmetric spin–orbit interaction (SOI)‐based approaches apply a practical limit on helicity
multiplexed metaoptics, ie, center symmetric information encoding. Contrarily, asymmetric …

Metasurfaces, which are the two-dimensional counterparts of metamaterials, have
demonstrated unprecedented capabilities to manipulate the wavefront of electromagnetic …

Allowing subwavelength-scale-digitization of optical wavefronts to achieve complete control
of light at interfaces, metasurfaces are particularly suited for the realization of planar phase …

The advent of metasurfaces in recent years has ushered in a revolutionary means to
manipulate the behavior of light on the nanoscale. The design of such structures, to date …

Optical metasurfaces with subwavelength thickness hold considerable promise for future
advances in fundamental optics and novel optical applications due to their unprecedented …

Optical non-linear phenomena are typically observed in natural materials interacting with
light at high intensities, and they benefit a diverse range of applications from communication …