While photographing the auroras during a geomagnetic storm, Mike Lewinski caught sight of something extraordinary: a ...

Helmut Hörner, from TU Wien, who dedicated his thesis to this topic, explains: "In our method, too, the light first falls on a partially transparent mirror. If you simply send a laser beam onto ...

Beams of light that can be guided into corkscrew-like shapes called optical vortices are used today in a range of applications. Pushing the limits of structured light, Harvard applied physicists ...

When it is hit with a powerful laser beam, it goes from being almost entirely transparent to briefly reflecting most of the light that hits it. To perform the experiment, the researchers used two ...