The light trap: The set-up comprises a partially transparent mirror, a thin, weak absorber, two converging lenses and a totally reflecting mirror. Due to precisely calculated interference effects, the ...

Scattering not only broadens the width of the optical transition between two levels but can enable optical gain and absorption to coexist — a fact that is unambiguously demonstrated by the observation ...

Physicists in the US and Germany have proposed a new type of material that could get around the absorption problems that have prevented the creation of practical “superlenses” for visible light. The ...