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 ...

For the first time, scientists have demonstrated that negative refraction can be achieved using atomic arrays—without the ...

The change in direction of a beam of light as it travels from one material to another is called refraction. The normal is a construction line drawn at right angles to the surface of the glass block.

Scientists have found a way to achieve negative refraction—where light bends the "wrong" way—using carefully arranged atomic ...

The dotted line is the normal (perpendicular) to the surface. In refraction calculations, angles are always measured between rays and the normal. The change in direction of a ray depends on the ...

In a gradient, light bends towards the higher-index part, as the law of refraction predicts, or according to Fermat's principle. In a homogeneous medium (top and bottom), light does not bend. Mix up ...