Discrete periodic structures play an important role in physics, and have opened up an exciting new area of investigation in recent years. Questions relating to

Caustics are natural phenomena, forming light patterns in rainbows or through drinking glasses, and creating light networks at the bottom of swimming pools. Onl

Structured singular light is an ubiquitous phenomenon. It is not only created when light refracts at a water surface but can also be found in the blue daytime s

Optical information processing of the future is associated with a new generation of compact nanoscale optical devices operating entirely with light. Moreover, a

The development of integrated silicon photonic circuits has recently been driven by the Internet and the push for high bandwidth as well as the need to reduce p