The unrestricted control of the surface structure and refractive index would allow for new and
improved functionalities in optoelectronic devices. Specifically, micro-patterned graded …

We present a light-extraction approach allowing for single-pass and omniangle outcoupling
of light from light-emitting diodes (LED). By using transformation optics, we perceive a …

What do ancient burning glasses used several centuries BC and modern microscope or
camera objectives have in common? Certainly not a lot when comparing their focusing and …