Structured light, especially beams carrying orbital angular momentum (OAM), has gained
much interest due to its unique amplitude and phase structures. In terms of communication …

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 …

Optical aberrations place fundamental limits on the achievable resolution with focusing and
imaging. In the context of structured light, optical imperfections and misalignments and …

Underwater wireless optical communication (UWOC) is an emerging and feasible
underwater communication technology and has developed rapidly in recent years. Building …

Varifocal lenses, conventionally implemented by changing the axial distance between
multiple optical elements, have a wide range of applications in imaging and optical beam …

During the past few years, metasurfaces have been used to demonstrate optical elements
and systems with capabilities that surpass those of conventional diffractive optics. Here, we …

Underwater wireless communications can be carried out through acoustic, radio frequency
(RF), and optical waves. Compared to its bandwidth limited acoustic and RF counterparts …

Optical metasurfaces are two-dimensional arrays of nano-scatterers that modify optical
wavefronts at subwavelength spatial resolution. They are poised to revolutionize optics by …

The angular response of thin diffractive optical elements is highly correlated. For example,
the angles of incidence and diffraction of a grating are locked through the grating momentum …

Multiplexing multiple orbital angular momentum (OAM) channels enables high-capacity
optical communication. However, optical scattering from ambient microparticles in the …