Label‐free super‐resolution (LFSR) imaging relies on light‐scattering processes in
nanoscale objects without a need for fluorescent (FL) staining required in super‐resolved FL …

The field of transformation optics shows that media containing gradients in optical properties
are equivalent to curved geometries of spacetime for the propagation of light. Conformal …

The resolution of conventional optical equipment is always restricted by the diffraction limit,
and improving on this was previously considered improbable. Optical super-resolution …

The concept of the diffraction limit put forth by Ernst Abbe and others has been an important
guiding principle limiting our ability to tightly focus classical waves, such as light and sound …

We investigate imaging by spherically symmetric absolute instruments that provide perfect
imaging in the sense of geometrical optics. We derive a number of properties of such …

In causal physics, the causal Green's function describes the radiation of a point source. Its
counterpart, the anti-causal Green's function, depicts a spherically converging wave …

Birefringence, from the very essence of the word itself, refers to the splitting of light rays into
two parts. In natural birefringent materials, this splitting is a beautiful phenomenon, resulting …

In the past years quasi-conformal map** has been generally used to design broadband
electromagnetic cloaks. However, this technique has some inherit practical limitations such …

Lenses are by far the most simple tools for visualization. Although they are intrinsically
limited in resolution, recent efforts have aimed at focusing visible light in micro-scale lenses …

We implement a two-dimensional Maxwell's fish eye lens using a waveguide-based artificial
dielectric. The Maxwell's fish eye lens consists of two metallic cylindrical plates sandwiching …