Add Yahoo as a preferred source to see more of our stories on Google. In a discovery that challenges conventional optics, scientists have managed to make a laser beam cast its own shadow—a feat ...

An LED and a semiconductor laser (or laser LED) work in essentially the same way, that is, light is emitted as electrons and holes combine, with emission wavelength dependent upon the materials used.

Most laser sources produce Gaussian beams that diverge as they propagate. This natural spreading limits their effectiveness in applications that require light to remain concentrated over long ...

BMW and Audi sometimes play a game of cat and mouse in the rarefied air of their markets, with one trying to beat the other ...

Using geometric phase inside lasers for the first time, researchers find a way to change the orbital angular momentum of laser beams. Nature Photonics today published research by a team from South ...

Viknesh Vijayenthiran February 11, 2014 Comment Now! BMW’s cars already have a distinctive look in your rear-view mirror with their angel-eye headlights and that view will soon start to look even more ...