Scientists have demonstrated that negative refraction can be achieved using atomic arrays -- without the need for artificially manufactured metamaterials. Scientists have long sought to control light ...

In this study, we revisit the popular method of measuring the nonlinear susceptibility of a material through Z-scan technique, introduced in 1990 by Sheik-Bahae and ...

BISMARCK, N.D. (KFYR) - When it’s extremely cold and sunny, atmospheric optics can appear, including sun and moon dogs, halos ...