The growing maturity of nanofabrication has ushered massive sophisticated optical
structures available on a photonic chip. The integration of subwavelength-structured …

Many polarisation techniques have been harnessed for decades in biological and clinical
research, each based upon measurement of the vectorial properties of light or the vectorial …

All light has structure, but only recently has it been possible to control it in all its degrees of
freedom and dimensions, fuelling fundamental advances and applications alike. Here we …

Planar optical elements that can manipulate the multidimensional physical parameters of
light efficiently and compactly are highly sought after in modern optics and nanophotonics. In …

Geometric phase is a unifying and central concept in physics, including optics. As a matter of
fact, optics played a pivotal role from the inception of this new paradigm, as some of the first …

Since their first introduction in 2006, q-plates have found a constantly increasing number of
uses in diverse contexts, ranging from fundamental research on complex structured light …

The Möbius strip, a fascinating loop structure with one-sided topology, provides a rich
playground for manipulating the non-trivial topological behaviour of spinning particles, such …

Graded index (GRIN) lenses are commonly used for compact imaging systems. It is not
widely appreciated that the ion-exchange process that creates the rotationally symmetric …

Vortex phenomena are ubiquitous in nature. In optics, despite the availability of numerous
techniques for vortex generation and detection, topological protection of vortex transport with …

Optical encryption is an increasingly significant technique in the realm of information
security. In the recent decade, there has been considerable interest in using planar optics …