Representation of domain walls within a ferromagnetic layered material. New research shows that when these materials are hit with a free electron laser, magnetic domain walls move much faster than ...

Physicists at the Technion Israel Institute of Technology have, for the first time, observed optical vortices—'holes' in light—moving faster than light. The phenomenon, long theorized, does not ...

For the experiment, a high-power green laser was directed through ruby cube and illuminated with a blue laser from the side. The green laser increases the optical absorption of the blue illuminating ...